In reply to bachan21:
Since you didn’t provide a complete example which demonstrates your issue, it can be hard to determine the exact issue.
Looking at the constraints you provided, req.start_count_UVM == 1, and req.final_count_UVM == me_q.size(), which in this instance is == 1. You also have a constraint that req.start_count_UVM < req.final_count_UVM, which conflicts with both items being equal to 1.