Thanks Mikhail, I know this might be on the wrong forum but the KpOPC references OpcNetApi, OpcNetApi.Com and OpcComRow. I have installed OPC core components both x64 and x86. The installers don’t seem to install files. I’ve searched the web for answers and many people have this issue. Did you ever encounter this issue? If so how did you fix it? I have downloaded another project and used the dlls from there for testing however after building the KpOpc, when I run the ScadaCommCtrl and try to use the KpOpc.dll I get the error “Could not load file or assembly OpcNetApi”.