Python Error: Application file not generated?

Question

I want to simulate a OpenModelica Model in Python with the help of OMPython. The following is my code:

import matplotlib.pyplot as plt  
import OMPython
from OMPython import OMCSessionZMQ
from OMPython import ModelicaSystem
omc = OMCSessionZMQ()
mod = ModelicaSystem("Li_ionBattery.mo", "Li_ionBattery.TestBench.VaryingCurrent")
Li_simulation = mod.getSimulationOptions()
mod.setSimulationOptions(["stopTime=2000", "stepSize=50"])
variables_vary = mod.getQuantities()
Parameters_vary = mod.getParameters() 
continous_vary = mod.getContinuous() 
mod.setParameters(["nMC_Data.Q_nom=11", "nMC_Data.Rs=0.0003"])
mod.simulate()

And I am getting the following error:

Notification: Li_ionBattery requested package Modelica of version 3.2.2. Modelica 3.2.3 is used instead which states that it is fully compatible without conversion script needed.

Error: Class Li_ionBattery.TestBench.VaryingCurrent not found in scope <top>.
Error: Class Li_ionBattery.TestBench.VaryingCurrent not found in scope <TOP>.

stopTime !is not a simulation-option variable
Traceback (most recent call last):

 

raise Exception("Error: application file not generated yet")

Exception: Error: application file not generated yet

Answer 1

The error is at line,

mod = ModelicaSystem("Li_ionBattery.mo", "Li_ionBattery.TestBench.VaryingCurrent")

as it reports,

Error: Class Li_ionBattery.TestBench.VaryingCurrent not found in scope <top>.

Make sure the class Li_ionBattery.TestBench.VaryingCurrent exists in Li_ionBattery.mo.