Heiko,  I see that the WSWindowPanel is deprecated in favor of the mosaic WindowPanel.  But when I used the WP from mosaic, the popup would show and disappear. But with the WSWindowPanel, the popup that I was using is showing up.  Not sure what else needs to be changed in mosaic WindowPanel for the popup to display.

This is in reference to the TheStore->Inventory.java->executeAdd usage.

I am not sure why you want to deprecate the WSWindowPanel.