It appears that the the license server for CPLEX has been turned off:
>[wrightse@mulnx31 upper]$ /ibrixfs1/software/ilog/ilm/ilmlist
>ilmlist v2.70
>License file "/ibrixfs1/software/ilog/ilm/access.ilm"
>Token server on "mulnx31.hpc.muohio.edu" is DOWN.
When should we expect it to be up again?
Steve