[petsc-users] check status of reading matrix from a file

[Michael Povolotskyi]

Dear Petsc developers,

I'm reading a matrix from a file like this:
PetscViewer viewer;
PetscErrorCode ierr;

MatCreate(comm,&matrix);

MatSetType(matrix,MATDENSE);

ierr = PetscViewerBinaryOpen(comm,file_name,FILE_MODE_READ,&viewer);
ierr = MatLoad(matrix,viewer);


Sometimes the file that is needed is not present and the code execution 
becomes frozen.

Is it possible to catch this situation looking at the ierr variable?

Thank you,

Michael.