topic Grasshopper to generate elements in ArchiCAD in Parametric design

Grasshopper to generate elements in ArchiCAD

derekjackson — Tue, 06 May 2025 11:02:32 GMT

Hi, I've made a Grasshopper script to create a range of elements in ArchiCAD, which appear either as Morphs or Objects once the script has been run. The user selects from one of 6 options from a Value List, then toggles the corresponding 'Syncronize' boolean to generate it.

What I've noticed is that some elements disappear from the AC project once their Syncronize is returned to False, yet others remain in the project. I can't see any consistency between which ones disappear and which ones need to manually removed with an Unlock / Delete.

Does anyone know why Grasshopper / AC sometimes removes items when Syncronize is turned off, and other times they remain locked in the AC project? Is there another Boolean toggle somewhere I'm missing?

Operating system used: Windows

Re: Grasshopper to generate elements in ArchiCAD

martyna_ — Tue, 24 Feb 2026 21:20:44 GMT

what I've noticed is that when you unlock the elements and try to edit them in archicad (change surface etc) they disappear. At least thats what happened to me, dont know if that helps

Re: Grasshopper to generate elements in ArchiCAD

martyna_ — Tue, 24 Feb 2026 21:24:57 GMT

@derekjackson, since I am also creating a range of Object using Grasshopper script I was wondering if you know a way to change the surface atribute of all those elements within the script