Two CHP in system one with no production

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I am using two identical microchp in my system by editing the example file microcogeneration and duplicating microchp object but although the building thermal need is more than one CHP can provide the second one would not start working. I have checked all the inputs many times but still no answer. interesting part is that the microchp that I have added to the system is working but the original one from example file won't work even though it is the first generator in the generator list and should have the priority.