I’ve gone to open Rhino WIP to explore it’s new features, and when i ran the _Constraints command, i got the Unknown command response. It was not avaiable from the Panel menu. It was available only trough Window > Panels > Constraints, but when clicking, the command seems unknown.
Did Constraints get the boot? I’ll be very sad if that happened
That feature was put on hold and taken out of the Rhino 8 WIP now that Rhino 8 is getting closer to its release. This project will then get picked up again and further developed during the Rhino 9 WIP cycle -