Bug - Curved window wall cutout

St1arquitetura — Wed, 19 Aug 2026 19:18:20 GMT

Hello, I received a model created in Archicad 26. When I open the .pla file, the arched window cutouts appear rectangular. If I open the .pln file we were sent, the arched wall cutouts display correctly; however, after I save the file and reopen it, the rectangular cutout bug returns. The most puzzling part is that the curved window cutouts in the wall appear correctly the first time the file is opened, but the bug reappears upon subsequent openings or saves.I have tried numerous procedures found in similar threads—such as removing libraries and importing the version 26 migration libraries or those from other versions but the problem persists.I have also reinstalled and repaired the Archicad installation.This happens with all curved windows.

1 - Initial file opening(.Pla):

library manager

2- Second opening:(bug)

Library manager(second opening)

1 - Initial pln file opening(.PLN FILE):

library manager: Pln file

2- Second opening:(bug) pln file

library manager: Pln file

If anyone has gone through something similar and managed to resolve it...

thanks.

Operating system used: Windows

topic Bug - Curved window wall cutout in Modeling

Bug - Curved window wall cutout