Hi - answer was that I was not as thorough in checking as I thought ...No boolean involved.
- I had an early assemblage of small columns & beam objects stuck on a GDL Construction layer which is always turned off - but these were still interacting with walls coincedent in space - atcually turning them into swiss cheese!
Why switched off objects should interact this way I don't know - do intersection priorities apply to this situation?
Cheers
Paul
PAUL KING | https://www.prime.net.nz
ArchiCAD 8-29 | Twinmotion 2025
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