nd my cat actually managed to take a nap on the laptop keyboard
Sorry...this is an unknown bug
more seriously, to reset ArchiCAD. press Alt+file/new & reset all.
you could then merge your file.
(sometimes, you don't even need to merge file; just reopen archicad ( in the openning file menu chose use latest projet settings _however it is more related to template afaik.) or you could chose the setup work environment and chose default profile.
AC12_27 |Win11_64bit|