The standard solver licence allows four cores parallel as that's a sensible number to speed things up but if you need more then the HPC (parallel) packs are used. So, for if you want to use up to 12, 36, 132 cores you'll need 1, 2 or three packs respectively. Note, if the documentation gives a slightly different number it's right: there are also Workgroups that just add a load of extra cores that are distributed as needed.
I can't comment on the licence terms. Please contact your licence provider (possibly Ansys?) and refer whoever responds to this thread.
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