Hello
Is there a difference if you set MINDIM or MINMEMB? You can go either to Analysis>Optimization>Topology>Parameter and then change minmemboff to mindim with a value, which will assign it to the Design Variable Property. Or you can go to Analysis>Optimization>Opticontrol and set MINDIM with a value, which creates a new optimization control named 'optistruct_opticontrol'.
Thank you in advance for your help!