Problems at AAF import

Hello!

has anyone suffered this error message 80000004 at importing an AAF?
Seems to be an AAF problem by itself.

The used AAF are exported by Final Cut Pro X, in ocasions works correct, in others attempts Nuendo crashes,
in other I receive this message.
Worse, the AAF are imported without problems into ProTools…

Used Configuration:
Mac Pro 12 core
16 GB RAM
Mac OS 10.8.2

Any ideas?