I have a configuration where zones wont add to the plan - see attached .mod.
The wall and column act as boundary but will only work when an extra line is added. Best to try the example to see.
Cheers John
John Hyland : ARINA : www.arina.biz
User ver 4 to 12 - Jumped to v22 - so many options and settings!!!
OSX 10.15.6 [Catalina] : Archicad 22 : 15" MacBook Pro 2019 [/size]