Can't add report to process set

Is there a specific method of submitting process tasks? When submitting a process, i’m getting the following message

Martin did you get an answer to this question. I’m getting the same error when I try to add a BAQ report to a process set. I’ve created a number of BAQ reports with Breaking and Routing and just recently started experiencing this error.

For one of them I tried tossing the original BAQ and Report and starting over and was able to successfully add the newly created report to a process set.

Created a new BAQ and report today and ended up with the same error.
I’m wondering if I’m inadvertently creating problems somewhere in my BAQ or Report Design but can’t determine what it would be.