My wait block should test if my pallet rack has enough space to store my pallets. So when I have 20 pallets and my store has space for 15, 15 should be stored and the other 5 pallets should wait in my wait block until the pallet rack has space again. The problem is that I get an error that there are no empty cells which means that the pallets which don't have space not wait in my block but go trough the wait block and that causes an error. Where is the problem? Wait block and rack pick are attached.