I am calling the C# dll from python and then loading the python module in National Instruments Test Stand. I am getting the same exceptions in python and in Test Stand. When I run the program in C# only there isn’t a problem, it works the way it shouldenter image description here

I attached a screenshot of the error in python.

import pythonnet
import os
pythonnet.load("coreclr")
from clr_loader import get_coreclr

import clr
import sys

               
#USING PYTHONNET LIBRARY
class CSharpAsmblyRefs: 
      
   
    #assembly_ConfigMngr_path = (r"C:\source\repos\Host\Tools\TestFramework.Test\bin\x64\Debug\net6.0-windows\")
    
    def __init__(self):
        assembly_Config_path = (r"C:\source\repos\Host\Tools\TestFramework.Test\bin\x64\Debug\net6.0-windows\")
        assembly_CSharpdll_path = (r"C:\source\repos\Host\Console.Test\Host\Common\DiagTestClients\ScriptingClientLib\bin\x64\Debug\net6.0-windows10.0.19041.0\")
        sys.path.append(assembly_CSharpdll_path)
       
        cwd = os.getcwd()
        clr.AddReference("ScriptingClientLib")
        clr.AddReference("NGPV.Common.ProtoDefinition")
        clr.AddReference("NGPV.Common.RPC")
        clr.AddReference("NGPV.Common.TraceListener")
        clr.AddReference("NGPV.Common.UIBase")
        clr.AddReference("ScriptingCommander")
        clr.AddReference("Diag")
        from ScriptingClientLib import ScriptingClient
        clr.AddReference("NGPV.Common.AppConfig")
        #from NGPV.Common.AppConfig import ProductPaths
        #self.pp = ProductPaths()
        sys.path.append(assembly_Config_path)
        clr.AddReference("System.Configuration.ConfigurationManager")
        from System.Configuration import ConfigurationManager
        
        scrptClient = ScriptingClient()
        scrptClient.RunAsync("Initialize.csx")
       
    def loadRefdlls(self):
               
        clr.AddReference("ScriptingClientLib")
        from ScriptingClientLib import ScriptingClient
        clr.AddReference("NGPV.Common.AppConfig")
        clr.AddReference("NGPV.Common.Helper")
       #from NGPV.Common.AppConfig import ProductPaths       
       
        self._ConfigMngrRef = clr.AddReference("System.Configuration.ConfigurationManager")
        from System.Configuration import ConfigurationManager

        #self.pp = ProductPaths()
        scrptClient = ScriptingClient()
        scrptClient.RunAsync("Initialize.csx")
        
        
    def importClasses_callRunAsyncFunc(self):
        from ScriptingClientLib import ScriptingClient
        #from NGPV.Common.AppConfig import ProductPaths
        from System.Configuration import ConfigurationManager        
        self.scrptClient = ScriptingClient()
        self.callRunAsync(scrptClient)
    
    def callRunAsync(self):          
        scrptClient = ScriptingClient()
        scrptClient.RunAsync("Initialize.csx")
    
    
   
sc = CSharpAsmblyRefs()

I am not sure what to try to find what is causing the problem. I would appreciate any suggestions on what it could be. I know that python strings are UTF-8 and C# is UTF-16 but I tried reading a C# string in Python and it worked. I’m not sure if it creates a problem though in the path.combine function.

Thanks