I currently use Python 2.5, Boa constructor 0.6.1 under Windows and Linux Mandrake. On a motion control CPU card, running Linux on Power PC, there is a Mono, C# dll server. To communicate with under Windows XP, I had to recompile the Python-Runtime project with VS C#. It works now fine under Boa: I can import clr and do the following: lib = clr.AddReference("PPmacClassLibrary") from PPmacClassLibrary import PPmacDeviceClass self.pmac = PPmacDeviceClass(HOST, "PythonPmac", port) Under Linux, it is not possible to do the same, I tryed to use clr.so and Python-Runtime.dll and the error message is : "impossible to load the assembly". Could you tell me how to solve that ? I am not familar with C# and Mono. Do I have to recompile under Mono and how to do ? I don't understand well how it works on Linux. Thanks a lot for your help Serge -- J'utilise la version gratuíte de SPAMfighter pour utilisateurs privés. Ce programme a supprimé1619 d'e-mails spam à ce jour. Les utilisateurs qui paient n'ont pas ce message dans leurse-mails. Obtenez la version gratuite de SPAMfighter ici: http://www.spamfighter.com/lfr