EVDRE reporting not stable: "hiding columns" & applying datarange formula"

Hi,

we use BPC 5.1. (SP6) With several EVDRE reports we experience that our excell session sometimes stops working, typically when changing the CV and expanding again. At the bottom of the excell we see the statements:

"hiding columns" or also "applying datarange formulas".

I wait for more than 10 minutes, but nothing changes and I can't do anything anymore and have to abort excell with CTRL + ALT + DEL ...

Does anyone experience the same problems? (We work with Office 2007)

regards

Dries