[OMPI users] openmpi-1.6.4 mpicc fails to compile hello_c.c

Hi, I have successfully built openmpi-1.6.3 and many previous openmpi versions on both RHEL5 and RHEL6, for the new openmpi-1.6.4 I do the same configure, make and install as before, but the resulting mpicc does not compile hello_c.c. I have PATH and LD_LIBRARY_PATH set correctly. [root@tesla ex

[OMPI users] Strange IO issues in MPI_Finalize

HI all, I have some code that uses parallel netCDF. I've run successfully on Titan (using the Cray MPICH derivative) and on my laptop (also running MPICH). However, when I run on one of our clusters running OMPI, the code barfs in MPI_Finalize() and doesn't write the complete/expected output fi