Dear Steen,
We think we know what is happening. The source media MOV file is actually composed of one stereo pair and fourteen mono tracks. However there is no way to describe that correctly in FCPXML so it decides it is 15 stereo channels, in the FCPXML you will see.
However when we crack it open we do not see the media as described in the XML and fall over.
If you could upload the clip in question to our ftp site we should be able to confirm this and then see what we can do to resolve the discrepancy between the description of the media and the media itself.
Will forward details of ftp.
Yours Sincerely
James.