Hi,
It looks as though this discussion has been deleted. If you have updated to the HotFix Twinmotion Preview2 and are still experiencing a crash converting the file from Preview 1 to Preview 2, it is very possible the crash you are experiencing will be resolved by the final release of Twinmotion 2023.1. I would best suggest submitting a Bug Report using the Contact Us button on the Community home page here. Including your Twinmotion .log file for the crash when submitting the report will help us to better understand the crash you are experiencing.
Best Regards,
Morgan