Great, Thank you very much for the help. I was absolutely not looking into that direction. Working great again now :)
> I looked into the IO issue, one hint is found with > > export OMPI_MCA_io_base_verbose=40 > mpirun -np 1 -H localhost:1 ./mpitest > ... > mca: base: components_open: found loaded component ompio > mca: base: components_open: component ompio open function successful > mca: base: components_open: found loaded component romio321 > mca: base: components_open: component romio321 open function successful > ... > > So in fact there are two IO components available: ompio and romio321. The > first is selected (and fails). If you select the second, mpitest works: > > $ mpirun -np 1 -H localhost:1 --mca io romio321 ./mpitest > This is process 1 / 1 > > You can make this permanent with > > export OMPI_MCA_io=romio321 > > added to your login scripts. > > HTH. (OpenMPI is too complicated for it's own good.) > > > John > > > > On 2021-02-03 09:51, [email protected] wrote: >> >> Hi Martin, >> >> I haven't run into your MPI_File_open issue (don't use it), but >> your code does fail for me too in the same way. >> >>> $> mpirun -np 1 -H localhost:1 ./fmpitest >>> fmpitest:/usr/local/lib/libmpi.so.5.0: ./fmpitest : WARNING: >>> symbol(mpi_fortran_statuses_ignore_) size mismatch, >>> relink your program >>> fmpitest:/usr/local/lib/libmpi.so.5.0: ./fmpitest : WARNING: >>> symbol(mpi_fortran_status_ignore_) size mismatch, >>> relink your program >> >> The Fortran symbol error you see is common and I'm not sure of the >> cause. I did look into it at one point and decided all definitions were >> in fact identical, so it might be a weird compiler+linker issue. >> >> It's never been symptomatic beyond the warning so I ignore it. >> >> >> --John >
