Hi Johan,
A couple of things I have found. If it had a filter and the filter is removed, that happens - solution - filter is: "1 = 2"
Second, the app generator builds all kind of forms and browses linked to forms, etc. - it is trying to do it according to the file relationships. I have had to delete relationships so that the TEMPLATEs would not complain. I have found that sometimes it is easier to add necessary relationships in after APPGEN does its thing.
So, putting in a filter there or deleting the Child of Browse would do the trick.
Ron