From a5e6dab84e721f90b522912e15199c43e8b7b0f8 Mon Sep 17 00:00:00 2001
From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Fri, 11 Aug 2017 00:30:45 +0200
Subject: [PATCH] Test for inequality instead.

---
 source/grid/grid_in.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/grid/grid_in.cc b/source/grid/grid_in.cc
index c8598cce41..fb94862a0e 100644
--- a/source/grid/grid_in.cc
+++ b/source/grid/grid_in.cc
@@ -2077,7 +2077,7 @@ void GridIn<3>::read_netcdf (const std::string &filename)
   // as it denotes an internal face
   for (unsigned int i=0; i<bmarker.size(); ++i)
     Assert(0<=bmarker[i] &&
-           static_cast<types::boundary_id>(bmarker[i])<numbers::internal_face_boundary_id,
+           static_cast<types::boundary_id>(bmarker[i])!=numbers::internal_face_boundary_id,
            ExcIO());
 
   // finally we setup the boundary
-- 
2.39.5