Eclipse hangs creating .par (EP5)

Hi,

did somebody already encounter the following problem and found a solution?

After changing some .property file parameters of my project I do the following in eclipse:

"Export" -> "Create Portal Archive" ->Next -> Mark Project Name -> Next .....

Result: 100%CPU and Eclipse with it's PopUp Window never coming back.

There is no compilation problem.

Any Hints?

Eclipse Plugin 5.0.5.0

Eclipse 2.0.2