Pete

problem solved - I was using wrong snap7.dll file ... topic to close :D

Hello, I have got a problem like in the photo. I have tried different ways to solve this but unfortunately without success. Do you have any idea what may cause that? code: import snap7 RACK = 0 SLOT = 1 plc= snap7.client.Client() plc.connect('172.30.84.10', RACK, SLOT) I am using Python 3.7(64 bit) and Visual Studio 2019