@anton_s said:

Hello corneydj,

That is an interesting case. This may be an issue with SketchUcation licensing on particular configurations of Mac OS X. I sent you a private message regarding this.

Best regards,

Anton

I get the same error message. Clothworks just stopped working one day. Not sure what I did.
MacOS 12.2.1, SketchUp 2021, SketchUcation 4.0, Clothworks Version Updated: 2017-02-28 10:27:19

Nicolaj