We try to get a detail screen refreshed after closing a modal document. The document pops up by means of a table task + process flow from a detail grid.

Solution 1:
Trigger a process flow on closing the modal popup 
Not working, the Close Document seems to not work as a start action in process flows

Solution 2:
Trigger a process flow with a table task that closes the popup
Not working, the popup closes, but after this, nothing happens

Any better ideas?