I'm not able to merge two files, 477Mb+99Mb. Even with cleaned files (trough resource collector). Both file resident on my ssd. My ws is 64Gb with RTX2060Super.
Could you please submit a bug report here and share a copy of both of your Twinmotion files packaged using the Resource Collector, as well as your crash logs (Where to find Twinmotion .log file)? Our support team can investigate this further and see what might be causing the problem.
Thanks for sharing the files. I was able to replicate those crashes you were receiving when merging the files.
I wasn't able to identify any workarounds because both files crash, even when attempting to merge them with blank new projects.
I have escalated this issue for our engineers to review. If they identify any workarounds, I will let you know.
For now, if you want to merge these files, you may need to delete some problematic assets from the files in order for them to merge. I do not know which assets specifically caused the issue, so it will largely be due to trial and error to identify which of them is causing the issue.
The engineers let me know that this issue should now be fixed in the new 2023.1 Preview 2 update that released this week. You should be able to merge these files in the new update.