The file was wonderful oneday, and the next we opened the .pln file we were in before, and the whole file had become a hotlinked module with-in it's self.
It sounds like a nested module problem, correct me if I'm wrong.
I recently experienced a similar problem in AC10 where I have the mainfile linked into the module file for reference purposes. As long as you have the skip nested module checked this works fine.
The problem occurred while having a module selected & right mouse clicking to update module it switched off the checkmark to skip nested modules all by itself. However when I updated the modules via hotlink manager all remains sweet. I suspect a bug??
Regards
Nick
ArchiCAD 4.1–22, Mac OS 10.14.x iMac 27" 3,2Ghz Intel-Core i5