Update error message.

git-svn-id: https://svn.dealii.org/trunk@28925 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/source/lac/sparse_direct.cc b/deal.II/source/lac/sparse_direct.cc
index 316bfc10a4391945ab6541b5ef233b746146d2c6..2b10e88c2daeffd2157d5c065cbebdda0c58420e 100644 (file)
--- a/deal.II/source/lac/sparse_direct.cc
+++ b/deal.II/source/lac/sparse_direct.cc
@@ -1843,7 +1843,7 @@ void SparseDirectUMFPACK::factorize (const Matrix &)
 void
 SparseDirectUMFPACK::solve (Vector<double> &) const
 {
-  AssertThrow(false, ExcMessage("To call this function you need UMFPACK, but you called ./configure without the necessary --with-umfpack switch."));
+  AssertThrow(false, ExcMessage("To call this function you need UMFPACK, but configured deal.II without passing the necessary switch to 'cmake'. Please consult the installation instructions in doc/readme.html."));
 }
 
 
@@ -1852,7 +1852,7 @@ void
 SparseDirectUMFPACK::solve (const Matrix &,
                             Vector<double> &)
 {
-  AssertThrow(false, ExcMessage("To call this function you need UMFPACK, but you called ./configure without the necessary --with-umfpack switch."));
+  AssertThrow(false, ExcMessage("To call this function you need UMFPACK, but configured deal.II without passing the necessary switch to 'cmake'. Please consult the installation instructions in doc/readme.html."));
 }