Hi Coiter,
Please look at the /tmp folder, the OFED installation logs should be there at a directory with the following syntax
OFED.xxxxx.logs where xxxxx is a random number,
for example:
OFED.22033.logs
There look for errors in the rpm installation log file:
#cd /tmp/OFED.22033.logs
#grep -i err
Since the error ocurrs after the mvapich rpm installation , I believe that issue is that the libgfortran.so.3()(64bit) library is missing ( we saw the same issue with other customers), after you make sure that it's indeed the issue, you can install the missing rpm ( #yum install libgfortran) and try installing MOFED again.
Hope it helps