Hello ,
Thank you for posting in the community and sorry to hear about the troubles with this error. I am not sure why you received this error as it seems like something failed during the saving process and we would need to investigate this further by looking at the Archicad file and Twinmotion file. I recommend you try the Datasmith Exporter plugin and see if you can get to export your scene from Archicad 25 into Twinmotion.
https://twinmotionhelp.epicgames.com/s/article/Getting-Started-using-Datasmith-Workflows-with-Twinmotion
https://www.twinmotion.com/plugins/archicad
https://www.youtube.com/watch?v=m3fQvegazzY
If you are still experiencing issues please contact us and report a bug by following this link so we can best assist:
https://twinmotionhelp.epicgames.com/s/case-community-page
Please note at this time M1 and Monterey are yet compatible but we are working on this.
https://twinmotionhelp.epicgames.com/s/article/TwinMotion-System-Requirements
Kind regards,
Vincent B.
