Hi All,
Thank you very much for reporting the issue and I am sorry about the experience!
Currently, we are investigating this problem and working on how to fix this. My first comment is, this may relate to both the Live Connection add-on and Rhino 6, therefore we may need an update for the add-on (and maybe ARCHICAD as well) in order for Rhino 6 to work properly with ARCHICAD!
I am very sorry about the situation! If you are working on an important project, I would suggest using Rhino 5 at the moment in order to avoid similar issues!
Thank you very much for your understanding! Have a nice Sunday!
Best regards,
Minh
Minh Nguyen
Technical Support Engineer
GRAPHISOFT