Hi,
so first the problem is still alive
But we have the right direction I think.
We were able to identify the problem, it looks like a linux - ia64 - NFS problem. We tried other platforms, and didn't get this error.
Only with our linux, ia64, fileserver is it possible to reporduce this problem.
At this moment our development is investigating the NFS code.
If someone is interested, I can public our solution for the problem, when our develoment send me the solution.
Regards
Alex