When I am running the system without a valve it is working fine. As soon as I am adding any valve I am getting error messages. Interesting as well none of the provided examples under Fluids, which include any valve do work.

Attached is my basic model. Any help is appreciated. Have tried to change initial states, pressures, temperatures. I do get different kind of errors depending on which fluid I use.

Really, really appreciate for any hints, help and direction.