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My Model looks like this:
PRODUCT-> SOURCE-> QUEUE1-> SERVER1-> QUEUE2-> SERVER2-> SINK.

I set trigger on exit on QUEUE1- CloseOutput(c), and I want open that output every time after 4 products exit SERVER 2.

What should I type in Trigger on exit of SERVER2?

Please help, here is the model.
Thank you

Ha thegame2,

You could play here a bit with for instance the Output(c) and the Mod(Output(c), 4) = 0 and only then re-open the queue again. This ensures that 4 products are out of the server.

Gr. Harry