interactive rendering wont update

[marc_mdig]

For some reason all of the sudden the interactive rendering will not update.
If I make any changes to lights or materials, it just starts calclulating the lightcache over and over, never stopping.
I have to stop the rendering and start over again
The issue started with Vray5 hotfix 2, updated to 5.1 but that didnt solve the issue.
Any ideas?

[marc_mdig]

Ok found something...seems to be a bug from anima. If I delete all characters everything works again.
Will try to find out why