When you upgrade the license manager or implement a new license file you just may see something like the following error:
10:48:44 (adskflex) UNSUPPORTED: "59200AMECH_PP_2009_0F" (024E CF45 AB41 CD1A ) loginname@machinename-MOBILE (License server system does not support this feature. (-18,327:10054 ""))
This typically means that they were working in the program when you changed the license (or sometimes just the license manager) and now it's not happy.
The error will continue to log in the debug log until the user exits the program, waits a few seconds then gets back in.