Print error messages to std:err and give more descriptive error message when opening a file fails.
Print error messages to std:err and give more descriptive error
message when opening a file fails.

git-svn-id: ffc1bc5b3feaf8644044862cc38c386ade156493@4439 434f946d-2f3d-0410-ba4c-cb9f52fb0dbf

certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh,certik/libmesh