For some of the licensed packages on Palmetto cluster, you can check the availability (and usage) of licenses using the lmstat command. For example, to see usage of COMSOL licenses:

/software/USR_LOCAL/flexlm/lmstat -a -c /software/USR_LOCAL/flexlm/licenses/comsol.dat 

Other packages for which you can check license usage similarly are listed in the /software/USR_LOCAL/flexlm/licenses directory:

$ ls /software/USR_LOCAL/flexlm/licenses
abaqus.dat    accelrys.dat  ansys.dat     comsol.dat    converge.dat  intel.dat     matlab.dat