Hello,
Thank you very much for your question and I am very sorry about the issue!
This is something I've never seen before! When you save the project into a different format (for example DWG), is it available to select, or there is no option available?
Additionally, I would like to check the Add-on Manager to see whether all 3rd-party addons are fully functional. You can find it under Option > Add-On Manager (if you are using INT version).
Looking forward to hearing from you!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT