Additional information : I have done this test on Windows Xp 32. I will soon be able to try on Windows 7 64 bits. Do you know where I can find exemples of call if external assembly with pythonnet ? Thanks for your help, Alexandre ----- Mail original ----- De: "alexandre pineau p" À: pythondotnet@python.org Envoyé: Lundi 16 Juin 2014 10:07:14 Objet: [Python.NET] using external assembly with pythonnet Hello, I'm a beginner in pythonnet, and I try to use an external assembly with pythonnet. I use python 2.7.7, and a pythonnet version installed with pip install --pre pythonnet. I have also installed the framework 4 I try to load for instance the tamir dll (net version 1.1). Assembly and source available here : http://www.tamirgal.com/blog/page/SharpSSH.aspx source code : import sys sys.path.append("E:\Alex\dotnet\SharpSSH") import clr clr.AddReference("Tamir.SharpSsh") I obtain the following error : E:\Alex\python>testdotnet.py Traceback (most recent call last): File "E:\Alex\python\testdotnet.py", line 10, in <module> clr.AddReference("Tamir.SharpSsh") System.IO.FileNotFoundException What is wrong in my use of pythonnet ? I have checked that there is a namespace Tamir.SharpSsh in dll source files. It is also possible to load this assembly with Ctypes : windll.LoadLibrary("E:\Alex\dotnet\SharpSSH\Tamir.SharpSsh.dll") Many thanks for your help. Alexandre _________________________________________________ Python.NET mailing list - PythonDotNet@python.org https://mail.python.org/mailman/listinfo/pythondotnet