PEM Fuel Cell Issues with opem.Static.Amphlett

[camiearth]

Hello everyone,

I have a problem with Solving the flowsheet PEM Fuel Cell in DWSIM. When I try to 'Solve' the following error shows up:

This error was raised during the calculation of a Unit Operation or Material Stream.

Python.Runtime.PythonException: cannot import name 'Power_Calc' from partially initialized module 'opem.Static.Amphlett' (most likely due to a circular import) (C:\Users\camil\AppData\Local\DWSIM\python_packages\opem\Static\Amphlett.py)
at Python.Runtime.PythonException.ThrowLastAsClrException()
at Python.Runtime.NewReferenceExtensions.BorrowOrThrow(NewReference& reference)
at Python.Runtime.PyModule.Import(String name)
at DWSIM.UnitOperations.UnitOperations.PEMFC_Amphlett.Calculate(Object args) in C:\Users\Daniel\source\repos\DanWBR\dwsim\DWSIM.UnitOperations\UnitOperations\CleanEnergies\PEMFC_Amphlett.vb:line 131
at DWSIM.SharedClasses.UnitOperations.BaseClass.Solve() in C:\Users\Daniel\source\repos\DanWBR\dwsim\DWSIM.SharedClasses\BaseClass\SimulationObjectBaseClasses.vb:line 473
at DWSIM.FlowsheetSolver.FlowsheetSolver.CalculateObjectAsync(Object fobj, CalculationArgs objArgs, CancellationToken ct) in C:\Users\Daniel\source\repos\DanWBR\dwsim\DWSIM.FlowsheetSolver\FlowsheetSolver.vb:line 316
at DWSIM.FlowsheetSolver.FlowsheetSolver.ProcessQueueInternalAsync(Object fobj, CancellationToken ct) in C:\Users\Daniel\source\repos\DanWBR\dwsim\DWSIM.FlowsheetSolver\FlowsheetSolver.vb:line 662

Does someone know how to solve it or experienced the same issue?

Thank you

[DanWBR]

@camiearth do you have OPEM installed in your python distro?

[camiearth]

Yes, I downloaded Python 3.8 and DWSIM 8.5 and then I added the path: C:\Users\camil\AppData\Roaming\Python\Python38\site-packages\opem in the general settings of DWSIM and -Solve- the flowsheet but for some reason does not work. I believe I do something wrong

[DanWBR]

We are already on DWSIM 8.8.0. Also, you must add a reference to the path that contains python3.dll, and this python environment should not contain OPEM because DWSIM already has its own.

[camiearth]

Thank you so much, very kind, I could solve it :) amazing work with DWSIM.