The parallel tests return the error:
Attempting to use an MPI routine after finalizing MPICH
See reference:
https://www.unidata.ucar.edu/mailing_lists/archives/netcdf-hdf/2007/msg00108.html
Need to add an H5close() immediately before calling MPI_Finalize().
Might create a new CGNS API to avoid calling HDF5 directly.