Yeah, I thought that might be the problem. I saw you recommend uninstalling UG8lib here. I tried to uninstall UG8lib on my computer, but it didn’t fix the error. I thought I may have still caused the error by having some conflicting libraries. On the next two Mac computers I tested I didn’t install the UG8lib library (or any other library other than Archim), since it was included. The error persisted in every case. If I am the only person having this issue on a Mac then at least I am consistent at doing the same thing wrong. It would be helpful to know if other Mac users see this error.