Correct check for file existence to use MPI_ERR_FILE_EXISTS

SGpp / DisCoTec

MPI-based code for distributed HPC simulations with the sparse grid combination technique

https://sparsegrids.org/

GNU Lesser General Public License v3.0

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Correct check for file existence to use MPI_ERR_FILE_EXISTS #59

Closed cniethammer closed 1 year ago

cniethammer commented 1 year ago

MPI_File_open may fail due to multiple problems and not return MPI_SUCCESS. So check for MPI_ERR_FILE_EXISTS if you intend to check for file existence.