Backward Compatibility with Version 6.3 and Earlier
The optsolver property has been replaced with an optmethod property in all optimization study steps. This supports both MMA and GCMMA, so the gcmma property on the Optimization Solver has been deprecated.
The millingActive property has been replaced by the manufacturingConstraint property in the Density Model feature. Models are migrated accordingly, and there is API migration which translates millingActive = Active to manufacturingConstraint = Milling.