The failure comes at the end when each processor tries to
remove() the created file. The second one appears to fail
-- possibly because of a race condition. In any case, if I
move the remove() call past MPI_Finalize(), the error goes away.
It is not clear of the exact circumstances that cause the
failure, but I encountered it with the following env.
- automake on centos7 64-bit.
- compiling with -O1 for gcc.
- The pnetcdf version is 1.8.1
- The command "mpiexec --version" gives:
Version: 3.0.4
Release Date: Wed Apr 24 10:08:10CDT2013