Barry- I sent a message to the HDF5 mailing list. It looks to me like the H5Screate_simple() function rejects the zero size for a dimension on purpose. I am hoping someone has a workaround.
Thanks, Brad On 01/28/2011 10:00 AM, Barry Smith wrote: > > Sounds like a bug report/inquiry to HDF5 folks. > > Barry > > > On Jan 28, 2011, at 10:23 AM, Brad Aagaard wrote: > >> We are trying to get HDF5 output working in PyLith using the PETSc HDF5 >> viewer. I get an HDF5 error >> >> H5Screate_simple(): zero sized dimension for non-unlimited dimension, >> VecView_MPI_HDF5() line 771 in petsc-dev/src/vec/vec/impls/mpi/pdvec.c >> >> when I have a Vec that has a zero local size on a processor (the global size >> is nonzero). The Vec layout is correct in that we expect some processors to >> have a local size of zero (the field is over only a portion of the domain). >> >> The collective write of the Vec creates the filespace using the global size >> and the memspace using the local size. It is in trying to create the >> memspace that the error occurs. I tried adjusting pdvec.c so that it creates >> a null memspace when the local size is zero but then I get an error during >> the write about differences in dimensions (the number of dimensions in the >> filespace and memspace don't agree). I was unable to find any info on this >> type of use case in the HDF5 documentation. >> >> I have attached a toy example that illustrates the problem. >> mpiexec -n 1 test_view [creates the expected test.h5 file] >> mpiexec -n 2 test_view [generates the above error] >> >> Thanks, >> Brad >> <test_view.tgz> > >
