Datasmith crashing on export - object 282/xxxx

Exported a draft version from Max 2023 to UE 5.4 and now suddenly after adding some more assets to the Max file the exporter crashes and closes Max without any errors.

It hits object 282 - 18% in the bottom panel every time before Max just closes and I have to re open.

Can’t find anything as to why it suddenly won’t export.

Is there a way to learn from “282” is in reference to the scene?

still looking for help with diagnosing datasmith issues during exports. got it working and now its back to not working. this time an object 65