Have a Genesis 2 iAvatar character imported through 3DXchange 6.
Upon using in an iClone 7 scene, textures can convert fine to PBR, and all renders fine within iClone 7.
If I attempt to export animation through iClone 7 FBX, get crash when textures are PBR. If I switch textures to Traditional, no crash.
This is not universal, has occurred only on some characters, have not identified a more specific pattern.

Error code is c0000005 - Access Violation

from web, 2 causes:
1) Accessing a stale pointer. That is accessing memory that has already been deallocated.
Note that such stale pointer accesses do not always result in access violations. Only if the memory manager has returned the memory to the system do you get an access violation.

2) Reading off the end of an array. This is when you have an array of length N and you access elements with index >=N.


Thinking one of materials might be an offending one, but could be all. Will update if any more specific finding occurs.
In meantime current workaround is to flip texture mats back to Traditional before export. Thx!