I am running gromacs on a machine with altivec support. My understanding is I have to use MVAPICH on this machine. <br><br>I occasionally have runs crash and I receive the following error<br><br><br>n559(0): Loaded with Money
<br><br>n536(14): 14 - MPI_ALLREDUCE : Null communicator<br>n536(14): [14] [] Aborting Program!<br>n559(0): 0 - MPI_ALLREDUCE : Null communicator<br>n559(0): [0] [] Aborting Program!<br>Cleaning up all processes ...Cleaning up all processes ...done.
<br><br><br>Does this indicate a problem with the machine, mvapich, or gromacs? Again, this doesn't always happen, just sometimes (which makes me suspect it is a machine issue). Any advice on where the problem might be would be helpful. thanks in advance.
<br><br>-Paul<br>