From 796306c281609cefe4ba77e5a956a882616a59e3 Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@43-1.org>
Date: Mon, 21 Mar 2022 11:19:24 -0500
Subject: [PATCH] Update deal.II release version to 9.4.0

---
 VERSION                          | 2 +-
 doc/users/CMakeLists.txt.sample  | 2 +-
 doc/users/CMakeLists.txt.sample2 | 2 +-
 doc/users/CMakeLists.txt.sample3 | 2 +-
 doc/users/cmake_user.html        | 8 ++++----
 doc/users/testsuite.html         | 4 ++--
 examples/step-1/CMakeLists.txt   | 2 +-
 examples/step-10/CMakeLists.txt  | 2 +-
 examples/step-11/CMakeLists.txt  | 2 +-
 examples/step-12/CMakeLists.txt  | 2 +-
 examples/step-12b/CMakeLists.txt | 2 +-
 examples/step-13/CMakeLists.txt  | 2 +-
 examples/step-14/CMakeLists.txt  | 2 +-
 examples/step-15/CMakeLists.txt  | 2 +-
 examples/step-16/CMakeLists.txt  | 2 +-
 examples/step-16b/CMakeLists.txt | 2 +-
 examples/step-17/CMakeLists.txt  | 2 +-
 examples/step-18/CMakeLists.txt  | 2 +-
 examples/step-19/CMakeLists.txt  | 2 +-
 examples/step-2/CMakeLists.txt   | 2 +-
 examples/step-20/CMakeLists.txt  | 2 +-
 examples/step-21/CMakeLists.txt  | 2 +-
 examples/step-22/CMakeLists.txt  | 2 +-
 examples/step-23/CMakeLists.txt  | 2 +-
 examples/step-24/CMakeLists.txt  | 2 +-
 examples/step-25/CMakeLists.txt  | 2 +-
 examples/step-26/CMakeLists.txt  | 2 +-
 examples/step-27/CMakeLists.txt  | 2 +-
 examples/step-28/CMakeLists.txt  | 2 +-
 examples/step-29/CMakeLists.txt  | 2 +-
 examples/step-3/CMakeLists.txt   | 2 +-
 examples/step-30/CMakeLists.txt  | 2 +-
 examples/step-31/CMakeLists.txt  | 2 +-
 examples/step-32/CMakeLists.txt  | 2 +-
 examples/step-33/CMakeLists.txt  | 2 +-
 examples/step-34/CMakeLists.txt  | 2 +-
 examples/step-35/CMakeLists.txt  | 2 +-
 examples/step-36/CMakeLists.txt  | 2 +-
 examples/step-37/CMakeLists.txt  | 2 +-
 examples/step-38/CMakeLists.txt  | 2 +-
 examples/step-39/CMakeLists.txt  | 2 +-
 examples/step-4/CMakeLists.txt   | 2 +-
 examples/step-40/CMakeLists.txt  | 2 +-
 examples/step-41/CMakeLists.txt  | 2 +-
 examples/step-42/CMakeLists.txt  | 2 +-
 examples/step-43/CMakeLists.txt  | 2 +-
 examples/step-44/CMakeLists.txt  | 2 +-
 examples/step-45/CMakeLists.txt  | 2 +-
 examples/step-46/CMakeLists.txt  | 2 +-
 examples/step-47/CMakeLists.txt  | 2 +-
 examples/step-48/CMakeLists.txt  | 2 +-
 examples/step-49/CMakeLists.txt  | 2 +-
 examples/step-5/CMakeLists.txt   | 2 +-
 examples/step-50/CMakeLists.txt  | 2 +-
 examples/step-51/CMakeLists.txt  | 2 +-
 examples/step-52/CMakeLists.txt  | 2 +-
 examples/step-53/CMakeLists.txt  | 2 +-
 examples/step-54/CMakeLists.txt  | 2 +-
 examples/step-55/CMakeLists.txt  | 2 +-
 examples/step-56/CMakeLists.txt  | 2 +-
 examples/step-57/CMakeLists.txt  | 2 +-
 examples/step-58/CMakeLists.txt  | 2 +-
 examples/step-59/CMakeLists.txt  | 2 +-
 examples/step-6/CMakeLists.txt   | 2 +-
 examples/step-60/CMakeLists.txt  | 2 +-
 examples/step-61/CMakeLists.txt  | 2 +-
 examples/step-62/CMakeLists.txt  | 2 +-
 examples/step-63/CMakeLists.txt  | 2 +-
 examples/step-64/CMakeLists.txt  | 2 +-
 examples/step-65/CMakeLists.txt  | 2 +-
 examples/step-66/CMakeLists.txt  | 2 +-
 examples/step-67/CMakeLists.txt  | 2 +-
 examples/step-68/CMakeLists.txt  | 2 +-
 examples/step-69/CMakeLists.txt  | 2 +-
 examples/step-7/CMakeLists.txt   | 2 +-
 examples/step-70/CMakeLists.txt  | 2 +-
 examples/step-71/CMakeLists.txt  | 2 +-
 examples/step-72/CMakeLists.txt  | 2 +-
 examples/step-74/CMakeLists.txt  | 2 +-
 examples/step-75/CMakeLists.txt  | 2 +-
 examples/step-76/CMakeLists.txt  | 2 +-
 examples/step-77/CMakeLists.txt  | 2 +-
 examples/step-78/CMakeLists.txt  | 2 +-
 examples/step-79/CMakeLists.txt  | 2 +-
 examples/step-8/CMakeLists.txt   | 2 +-
 examples/step-85/CMakeLists.txt  | 2 +-
 examples/step-9/CMakeLists.txt   | 2 +-
 87 files changed, 91 insertions(+), 91 deletions(-)

diff --git a/VERSION b/VERSION
index 4ddfa9eb55..be3d36737c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-10.0.0-pre
+9.4.0-pre
diff --git a/doc/users/CMakeLists.txt.sample b/doc/users/CMakeLists.txt.sample
index 9f3717ea04..345d48b14a 100644
--- a/doc/users/CMakeLists.txt.sample
+++ b/doc/users/CMakeLists.txt.sample
@@ -1,6 +1,6 @@
 CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
 
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 DEAL_II_INITIALIZE_CACHED_VARIABLES()
diff --git a/doc/users/CMakeLists.txt.sample2 b/doc/users/CMakeLists.txt.sample2
index 6e4a93f80f..349e36edf5 100644
--- a/doc/users/CMakeLists.txt.sample2
+++ b/doc/users/CMakeLists.txt.sample2
@@ -1,4 +1,4 @@
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS
     ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
     # You can specify additional hints for search paths here, e.g.
diff --git a/doc/users/CMakeLists.txt.sample3 b/doc/users/CMakeLists.txt.sample3
index f4faabb4cf..e48f3ba20a 100644
--- a/doc/users/CMakeLists.txt.sample3
+++ b/doc/users/CMakeLists.txt.sample3
@@ -1,4 +1,4 @@
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS
     ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
     # You can specify additional hints for search paths here, e.g.
diff --git a/doc/users/cmake_user.html b/doc/users/cmake_user.html
index cb7d0510e1..ca31554375 100644
--- a/doc/users/cmake_user.html
+++ b/doc/users/cmake_user.html
@@ -65,7 +65,7 @@
 <pre class="cmake">
 CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
 
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 DEAL_II_INITIALIZE_CACHED_VARIABLES()
@@ -272,7 +272,7 @@ In this case the top level <code>CMakeLists.txt</code> file may be:
 <pre class="cmake">
 # top level CMakeLists.txt
 CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED)
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED)
 
 DEAL_II_INITIALIZE_CACHED_VARIABLES()
 PROJECT(myproject)
@@ -503,7 +503,7 @@ The <code>DEAL_II_INITIALIZE_CACHED_VARIABLES</code> macro is responsible
 for setting up cached variables and has to invoked before the
 <code>PROJECT</code> call:
 <pre class="cmake">
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED)
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED)
 
 DEAL_II_INITIALIZE_CACHED_VARIABLES()
 
@@ -647,7 +647,7 @@ INSTALL(DIRECTORY run DESTINATION share/mycode/run)
 </p>
 
 <pre class="cmake">
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS
     ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
     # You can specify additional hints for search paths here, e.g.
diff --git a/doc/users/testsuite.html b/doc/users/testsuite.html
index 149e5a17ef..567ae2dddd 100644
--- a/doc/users/testsuite.html
+++ b/doc/users/testsuite.html
@@ -111,7 +111,7 @@ SET(TARGET step-1)
 SET(TARGET_SRC step-1.cc)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 
@@ -216,7 +216,7 @@ tests/support/my_test_2.output</pre>
 # top-level CMakelists.txt
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.3.0)
-FIND_PACKAGE(deal.II 10.0.0 REQUIRED
+FIND_PACKAGE(deal.II 9.4.0 REQUIRED
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 
diff --git a/examples/step-1/CMakeLists.txt b/examples/step-1/CMakeLists.txt
index af69e7258e..fee20c6cdb 100644
--- a/examples/step-1/CMakeLists.txt
+++ b/examples/step-1/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-10/CMakeLists.txt b/examples/step-10/CMakeLists.txt
index b2495cce69..e3cc55c13e 100644
--- a/examples/step-10/CMakeLists.txt
+++ b/examples/step-10/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-11/CMakeLists.txt b/examples/step-11/CMakeLists.txt
index af7232ddf0..b78f89edea 100644
--- a/examples/step-11/CMakeLists.txt
+++ b/examples/step-11/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-12/CMakeLists.txt b/examples/step-12/CMakeLists.txt
index a40d71bb1e..f9d4d389cc 100644
--- a/examples/step-12/CMakeLists.txt
+++ b/examples/step-12/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-12b/CMakeLists.txt b/examples/step-12b/CMakeLists.txt
index 8b584d3d32..52ef8b2193 100644
--- a/examples/step-12b/CMakeLists.txt
+++ b/examples/step-12b/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-13/CMakeLists.txt b/examples/step-13/CMakeLists.txt
index a7983b7e02..8365a9002e 100644
--- a/examples/step-13/CMakeLists.txt
+++ b/examples/step-13/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-14/CMakeLists.txt b/examples/step-14/CMakeLists.txt
index f5e0be2c9b..594b8c4779 100644
--- a/examples/step-14/CMakeLists.txt
+++ b/examples/step-14/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-15/CMakeLists.txt b/examples/step-15/CMakeLists.txt
index 32ee7412f1..fc5ec25318 100644
--- a/examples/step-15/CMakeLists.txt
+++ b/examples/step-15/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-16/CMakeLists.txt b/examples/step-16/CMakeLists.txt
index 6bd29f5685..8f8e96913f 100644
--- a/examples/step-16/CMakeLists.txt
+++ b/examples/step-16/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-16b/CMakeLists.txt b/examples/step-16b/CMakeLists.txt
index 6462299be8..352192a7b2 100644
--- a/examples/step-16b/CMakeLists.txt
+++ b/examples/step-16b/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-17/CMakeLists.txt b/examples/step-17/CMakeLists.txt
index 2e533e382f..a005b38e28 100644
--- a/examples/step-17/CMakeLists.txt
+++ b/examples/step-17/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS
     ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../  $ENV{DEAL_II_DIR}
   )
diff --git a/examples/step-18/CMakeLists.txt b/examples/step-18/CMakeLists.txt
index 1f2acef84d..388346e59e 100644
--- a/examples/step-18/CMakeLists.txt
+++ b/examples/step-18/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS
     ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../  $ENV{DEAL_II_DIR}
   )
diff --git a/examples/step-19/CMakeLists.txt b/examples/step-19/CMakeLists.txt
index 8ee6301848..004082a2e5 100644
--- a/examples/step-19/CMakeLists.txt
+++ b/examples/step-19/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0 QUIET
+FIND_PACKAGE(deal.II 9.4.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-2/CMakeLists.txt b/examples/step-2/CMakeLists.txt
index 0ccafc252b..bda07faee8 100644
--- a/examples/step-2/CMakeLists.txt
+++ b/examples/step-2/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-20/CMakeLists.txt b/examples/step-20/CMakeLists.txt
index 1d9e70fcd5..298f1074a8 100644
--- a/examples/step-20/CMakeLists.txt
+++ b/examples/step-20/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-21/CMakeLists.txt b/examples/step-21/CMakeLists.txt
index 12c1821fea..d07f2871ad 100644
--- a/examples/step-21/CMakeLists.txt
+++ b/examples/step-21/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-22/CMakeLists.txt b/examples/step-22/CMakeLists.txt
index 853fa15762..1ec491eeb1 100644
--- a/examples/step-22/CMakeLists.txt
+++ b/examples/step-22/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-23/CMakeLists.txt b/examples/step-23/CMakeLists.txt
index 104d55adbf..de904826de 100644
--- a/examples/step-23/CMakeLists.txt
+++ b/examples/step-23/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-24/CMakeLists.txt b/examples/step-24/CMakeLists.txt
index 2b80d004a6..8aee1e270f 100644
--- a/examples/step-24/CMakeLists.txt
+++ b/examples/step-24/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-25/CMakeLists.txt b/examples/step-25/CMakeLists.txt
index d2b7ea2c12..53cee58733 100644
--- a/examples/step-25/CMakeLists.txt
+++ b/examples/step-25/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-26/CMakeLists.txt b/examples/step-26/CMakeLists.txt
index 2757e2abe4..0e3f23d275 100644
--- a/examples/step-26/CMakeLists.txt
+++ b/examples/step-26/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-27/CMakeLists.txt b/examples/step-27/CMakeLists.txt
index 3a757a02bd..0da8d28bd5 100644
--- a/examples/step-27/CMakeLists.txt
+++ b/examples/step-27/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-28/CMakeLists.txt b/examples/step-28/CMakeLists.txt
index 260c131502..f51064d49e 100644
--- a/examples/step-28/CMakeLists.txt
+++ b/examples/step-28/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-29/CMakeLists.txt b/examples/step-29/CMakeLists.txt
index a33fa3ce72..9b01f34bca 100644
--- a/examples/step-29/CMakeLists.txt
+++ b/examples/step-29/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-3/CMakeLists.txt b/examples/step-3/CMakeLists.txt
index 5c007abfd9..46d91d1f46 100644
--- a/examples/step-3/CMakeLists.txt
+++ b/examples/step-3/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-30/CMakeLists.txt b/examples/step-30/CMakeLists.txt
index f4ac4aeebc..cc2c042249 100644
--- a/examples/step-30/CMakeLists.txt
+++ b/examples/step-30/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-31/CMakeLists.txt b/examples/step-31/CMakeLists.txt
index 7180e8f845..199b2eaa13 100644
--- a/examples/step-31/CMakeLists.txt
+++ b/examples/step-31/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-32/CMakeLists.txt b/examples/step-32/CMakeLists.txt
index 0615acc301..bb4ec76a40 100644
--- a/examples/step-32/CMakeLists.txt
+++ b/examples/step-32/CMakeLists.txt
@@ -26,7 +26,7 @@ SET(CLEAN_UP_FILES *.vtu *.pvtu *.visit)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-33/CMakeLists.txt b/examples/step-33/CMakeLists.txt
index c3b71f19a1..b3d28a9b9a 100644
--- a/examples/step-33/CMakeLists.txt
+++ b/examples/step-33/CMakeLists.txt
@@ -26,7 +26,7 @@ SET(TARGET_RUN ${TARGET} input.prm)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-34/CMakeLists.txt b/examples/step-34/CMakeLists.txt
index e87fb3be13..74bddcda93 100644
--- a/examples/step-34/CMakeLists.txt
+++ b/examples/step-34/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-35/CMakeLists.txt b/examples/step-35/CMakeLists.txt
index 5a018094a2..4b122ad031 100644
--- a/examples/step-35/CMakeLists.txt
+++ b/examples/step-35/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-36/CMakeLists.txt b/examples/step-36/CMakeLists.txt
index e99a752ce4..aef9b8cfc7 100644
--- a/examples/step-36/CMakeLists.txt
+++ b/examples/step-36/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-37/CMakeLists.txt b/examples/step-37/CMakeLists.txt
index b776eedbfe..ed106b595e 100644
--- a/examples/step-37/CMakeLists.txt
+++ b/examples/step-37/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-38/CMakeLists.txt b/examples/step-38/CMakeLists.txt
index ed49d7af3c..39de8496a2 100644
--- a/examples/step-38/CMakeLists.txt
+++ b/examples/step-38/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-39/CMakeLists.txt b/examples/step-39/CMakeLists.txt
index a38c15e7ef..98821f2e7e 100644
--- a/examples/step-39/CMakeLists.txt
+++ b/examples/step-39/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-4/CMakeLists.txt b/examples/step-4/CMakeLists.txt
index 73f75b8060..bfc704b04b 100644
--- a/examples/step-4/CMakeLists.txt
+++ b/examples/step-4/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-40/CMakeLists.txt b/examples/step-40/CMakeLists.txt
index 663c25155f..c7e18d8e71 100644
--- a/examples/step-40/CMakeLists.txt
+++ b/examples/step-40/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-41/CMakeLists.txt b/examples/step-41/CMakeLists.txt
index 3f6cc1e198..58d662ead6 100644
--- a/examples/step-41/CMakeLists.txt
+++ b/examples/step-41/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-42/CMakeLists.txt b/examples/step-42/CMakeLists.txt
index fc3841801b..f8dc051aab 100644
--- a/examples/step-42/CMakeLists.txt
+++ b/examples/step-42/CMakeLists.txt
@@ -26,7 +26,7 @@ SET(CLEAN_UP_FILES *.vtu *.pvtu *.visit)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-43/CMakeLists.txt b/examples/step-43/CMakeLists.txt
index 8b071f4a96..bb25c00c61 100644
--- a/examples/step-43/CMakeLists.txt
+++ b/examples/step-43/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-44/CMakeLists.txt b/examples/step-44/CMakeLists.txt
index c491b596fb..aa32cd4d2a 100644
--- a/examples/step-44/CMakeLists.txt
+++ b/examples/step-44/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-45/CMakeLists.txt b/examples/step-45/CMakeLists.txt
index 58c503a84d..3c6e5fc4b0 100644
--- a/examples/step-45/CMakeLists.txt
+++ b/examples/step-45/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-46/CMakeLists.txt b/examples/step-46/CMakeLists.txt
index 73361b141e..80382e9dfc 100644
--- a/examples/step-46/CMakeLists.txt
+++ b/examples/step-46/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-47/CMakeLists.txt b/examples/step-47/CMakeLists.txt
index 99689b4bfa..dc830cf025 100644
--- a/examples/step-47/CMakeLists.txt
+++ b/examples/step-47/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-48/CMakeLists.txt b/examples/step-48/CMakeLists.txt
index 90c63d6a15..b3601a1c54 100644
--- a/examples/step-48/CMakeLists.txt
+++ b/examples/step-48/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-49/CMakeLists.txt b/examples/step-49/CMakeLists.txt
index 133d13c4a6..7033fa393c 100644
--- a/examples/step-49/CMakeLists.txt
+++ b/examples/step-49/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-5/CMakeLists.txt b/examples/step-5/CMakeLists.txt
index bc59befb66..11052b7523 100644
--- a/examples/step-5/CMakeLists.txt
+++ b/examples/step-5/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-50/CMakeLists.txt b/examples/step-50/CMakeLists.txt
index 62df717be0..b687a02c25 100644
--- a/examples/step-50/CMakeLists.txt
+++ b/examples/step-50/CMakeLists.txt
@@ -26,7 +26,7 @@ SET(CLEAN_UP_FILES *.vtu *.pvtu *.visit)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-51/CMakeLists.txt b/examples/step-51/CMakeLists.txt
index 87b6b18e36..93c7bd1e6c 100644
--- a/examples/step-51/CMakeLists.txt
+++ b/examples/step-51/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-52/CMakeLists.txt b/examples/step-52/CMakeLists.txt
index 452c5f1dee..200c29a54d 100644
--- a/examples/step-52/CMakeLists.txt
+++ b/examples/step-52/CMakeLists.txt
@@ -26,7 +26,7 @@ SET(CLEAN_UP_FILES *.vtu)
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-53/CMakeLists.txt b/examples/step-53/CMakeLists.txt
index 54def137b8..c98d2a87a9 100644
--- a/examples/step-53/CMakeLists.txt
+++ b/examples/step-53/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-54/CMakeLists.txt b/examples/step-54/CMakeLists.txt
index 5f2496b399..5ec0447d71 100644
--- a/examples/step-54/CMakeLists.txt
+++ b/examples/step-54/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-55/CMakeLists.txt b/examples/step-55/CMakeLists.txt
index dc06e52484..f3166399c4 100644
--- a/examples/step-55/CMakeLists.txt
+++ b/examples/step-55/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-56/CMakeLists.txt b/examples/step-56/CMakeLists.txt
index 95d62cb3ec..5f7e1c9282 100644
--- a/examples/step-56/CMakeLists.txt
+++ b/examples/step-56/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-57/CMakeLists.txt b/examples/step-57/CMakeLists.txt
index b23112915c..740a2f624c 100644
--- a/examples/step-57/CMakeLists.txt
+++ b/examples/step-57/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-58/CMakeLists.txt b/examples/step-58/CMakeLists.txt
index 87754c95b7..ec43fce133 100644
--- a/examples/step-58/CMakeLists.txt
+++ b/examples/step-58/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-59/CMakeLists.txt b/examples/step-59/CMakeLists.txt
index d9508e6fd4..71aad34011 100644
--- a/examples/step-59/CMakeLists.txt
+++ b/examples/step-59/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-6/CMakeLists.txt b/examples/step-6/CMakeLists.txt
index 175c38b1b5..7155478e34 100644
--- a/examples/step-6/CMakeLists.txt
+++ b/examples/step-6/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-60/CMakeLists.txt b/examples/step-60/CMakeLists.txt
index eac27cbdb2..38fce69197 100644
--- a/examples/step-60/CMakeLists.txt
+++ b/examples/step-60/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-61/CMakeLists.txt b/examples/step-61/CMakeLists.txt
index 9cd63787ea..ee6e9662b4 100644
--- a/examples/step-61/CMakeLists.txt
+++ b/examples/step-61/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-62/CMakeLists.txt b/examples/step-62/CMakeLists.txt
index 13835d807a..1d6e45a3a3 100644
--- a/examples/step-62/CMakeLists.txt
+++ b/examples/step-62/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-63/CMakeLists.txt b/examples/step-63/CMakeLists.txt
index 42e0a45298..9fe5afbed8 100644
--- a/examples/step-63/CMakeLists.txt
+++ b/examples/step-63/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-64/CMakeLists.txt b/examples/step-64/CMakeLists.txt
index 4383eb41d0..79c9c591da 100644
--- a/examples/step-64/CMakeLists.txt
+++ b/examples/step-64/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.10)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-65/CMakeLists.txt b/examples/step-65/CMakeLists.txt
index c407a97f69..2106ad8d55 100644
--- a/examples/step-65/CMakeLists.txt
+++ b/examples/step-65/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-66/CMakeLists.txt b/examples/step-66/CMakeLists.txt
index 2ffca90ac8..aedcb0435d 100644
--- a/examples/step-66/CMakeLists.txt
+++ b/examples/step-66/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0 QUIET
+FIND_PACKAGE(deal.II 9.4.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-67/CMakeLists.txt b/examples/step-67/CMakeLists.txt
index 9dd258cad5..c669dab6ef 100644
--- a/examples/step-67/CMakeLists.txt
+++ b/examples/step-67/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-68/CMakeLists.txt b/examples/step-68/CMakeLists.txt
index 71b379f0e0..9b70d03138 100644
--- a/examples/step-68/CMakeLists.txt
+++ b/examples/step-68/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0 QUIET
+FIND_PACKAGE(deal.II 9.4.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-69/CMakeLists.txt b/examples/step-69/CMakeLists.txt
index 560d528c22..9f4b04a6c3 100644
--- a/examples/step-69/CMakeLists.txt
+++ b/examples/step-69/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-7/CMakeLists.txt b/examples/step-7/CMakeLists.txt
index 32c0b95e76..223bdc6539 100644
--- a/examples/step-7/CMakeLists.txt
+++ b/examples/step-7/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-70/CMakeLists.txt b/examples/step-70/CMakeLists.txt
index 5d7de6fe80..f368d272da 100644
--- a/examples/step-70/CMakeLists.txt
+++ b/examples/step-70/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-71/CMakeLists.txt b/examples/step-71/CMakeLists.txt
index 0a25ca9660..11f74d7b70 100644
--- a/examples/step-71/CMakeLists.txt
+++ b/examples/step-71/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0 QUIET
+FIND_PACKAGE(deal.II 9.4.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-72/CMakeLists.txt b/examples/step-72/CMakeLists.txt
index 8f222d6252..91f9266d26 100644
--- a/examples/step-72/CMakeLists.txt
+++ b/examples/step-72/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0 QUIET
+FIND_PACKAGE(deal.II 9.4.0 QUIET
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-74/CMakeLists.txt b/examples/step-74/CMakeLists.txt
index 15b42c49cd..4128fc9592 100644
--- a/examples/step-74/CMakeLists.txt
+++ b/examples/step-74/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-75/CMakeLists.txt b/examples/step-75/CMakeLists.txt
index c0d7171f03..b98cb5bbda 100644
--- a/examples/step-75/CMakeLists.txt
+++ b/examples/step-75/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-76/CMakeLists.txt b/examples/step-76/CMakeLists.txt
index b6dce240fc..a344e74ba2 100644
--- a/examples/step-76/CMakeLists.txt
+++ b/examples/step-76/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-77/CMakeLists.txt b/examples/step-77/CMakeLists.txt
index 76c9fc51ae..69eee7a0e4 100644
--- a/examples/step-77/CMakeLists.txt
+++ b/examples/step-77/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-78/CMakeLists.txt b/examples/step-78/CMakeLists.txt
index d133b88c3f..78a4535f82 100644
--- a/examples/step-78/CMakeLists.txt
+++ b/examples/step-78/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-79/CMakeLists.txt b/examples/step-79/CMakeLists.txt
index 2b4809ae3e..41b64fe49a 100644
--- a/examples/step-79/CMakeLists.txt
+++ b/examples/step-79/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-8/CMakeLists.txt b/examples/step-8/CMakeLists.txt
index 1074c80e14..025daee6d1 100644
--- a/examples/step-8/CMakeLists.txt
+++ b/examples/step-8/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-85/CMakeLists.txt b/examples/step-85/CMakeLists.txt
index dbc0f7dfb4..29e8ffb7d2 100644
--- a/examples/step-85/CMakeLists.txt
+++ b/examples/step-85/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
diff --git a/examples/step-9/CMakeLists.txt b/examples/step-9/CMakeLists.txt
index 7a84a2aa85..b45d5fbeab 100644
--- a/examples/step-9/CMakeLists.txt
+++ b/examples/step-9/CMakeLists.txt
@@ -23,7 +23,7 @@ SET(TARGET_SRC
 
 CMAKE_MINIMUM_REQUIRED(VERSION 3.1.0)
 
-FIND_PACKAGE(deal.II 10.0.0
+FIND_PACKAGE(deal.II 9.4.0
   HINTS ${deal.II_DIR} ${DEAL_II_DIR} ../ ../../ $ENV{DEAL_II_DIR}
   )
 IF(NOT ${deal.II_FOUND})
-- 
2.39.5