About model problem.

hi all

when i run the test model, it can do what i set.
I run the model for a while and the item of item type 3 stop on conveyor every time after i expand the test model by same setting. it cause block and stop the model.
what's the problem with the expanded model?

help me please!!

Thank a lot.
P.S.: my flexsim version is 4.3.

I'm not exactly sure where you mean but for example, the pull requirement of Processor56 is looking for itemtypes 1 and 2 only, so the black item with type 3 is stuck.