I should've checked that, and you're correct, it's another Multitexture issue. The problem object has a Multitexture Mat applied.
- Scene opens fine with Max2020, RC 3.3.1, and Multitexture installed.
- Scene crashes after upgrading to RC 4.0.9.
- Scene then loads fine, after removing MultiTexture_max2020_ver2.04_64bit from the Plugins folder.
Looks like the FP/Multitexture issue is also apparent in RC.
I contacted the Multitexture guys about the FP issues earlier this week, this was their reply:
"We have been notified by itoo that there seems to be an issues, hopefully we can get it fixed, but I do not know when yet."