Is the optimization in optistruct license by nr core threads specified and not nr CPU like FE?
You can review the help content below.
Solver In-App Licensing
https://2021.help.altair.com/2021.2/hwsolvers/altair_help/topics/getting_started/unit_draw_solvers_r.htm#reference_htx_2xm_scb
You can review the help content below.
Solver In-App Licensing
https://2021.help.altair.com/2021.2/hwsolvers/altair_help/topics/getting_started/unit_draw_solvers_r.htm#reference_htx_2xm_scb