could you please post the model?
Something seems to go wrong with drawing the MUs.
We need the model to be able to find the problem.
I just inserted an assembly station between single proc 1 & 2 and everything runs fine.
Do I have to do something else?
thanks, I was able to reproduce your problem.
It has to do with the visualization of the animation points.
Just right click in the frame background and turn off 'Show Animation Points' in the 'View Options'.
Then it's working.
We'll look into this and fix it with the next service pack.