If you try to open a file with a ":" in the filename (ex: "file:o"), you
get an MPI_ERR_NO_SUCH_FILE.
ERROR Returned by MPI: 42
ERROR_string Returned by MPI: MPI_ERR_NO_SUCH_FILE: no such file or
Just launch the simple test code attached to see the problem.
MPICH has the same bug, but is a little more explicit about it:
ADIO_RESOLVEFILETYPE_PREFIX(575): Invalid file name file:o
Is this really a bug?