An error message appears during simulation
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When I was running the simulation, I set the variables as the top product yield and the reflux ratio, but the following error message appeared. What does it mean? Could some experts please take a look? Thank you. *** error *** Unit 1, ‘t-2304’ – the flow rates based on volume and weight are only estimates for varying draw rates. Enter the volume or weight-based rate for stream 325 as a specification, and then adjust the side draw rate to achieve that rate.
stream325 is extracted, and this amount must be fixed; it cannot change.
Your tower has multiple outlets; it is necessary to define the output volume for stream325, and then adjust the side-stream outputs to achieve balance