Troubleshooting MPI failure to start on OSXΒΆ

On some versions of OSX, users have reported issues with MPI processes failing to start. This problem can be identified as it causes errors of the kind

[[20648,0],0] bind() failed on error Address already in use

It appears a solution for this is simply to run:

export TMPDIR=/tmp

Then to run VSimComposer from the same terminal.