Hello ,
Thank you for posting in the community and sorry to hear about the troubles. It looks like in the screen-shot you are using an older plugin and recommend you uninstall and reinstall it with the latest one. Here is the direct link to download the current latest version: https://unrealstudio.epicgames.com/UnrealDatasmithArchicadExporter_5_0_Preview1.msi
If you are still having issues after updating to the latest please contact us directly by following this link and report a bug:
https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.
I have updated plugin, uninstalled - installed again. I also delete and re-install archicad. I have checked for updates. Nothing works. I can create a datasmith file with only a couple of walls, but as soon as I add any objects, windows etc. I have this error pop up.
I have reported the bug via following link. I still have this issue. (I have updated plugin)