When we call a Method from the PLC to the OPC foundation library GitHub - OPCFoundation/UA-.NETStandard: OPC Unified Architecture .NET Standard , we get an error on the MethodGetHandle function block with error 8034 Bad_NodeIdUnknown, whereas when I test this with UAExpert, it works fine. Individual arguments work, but when we create a structure from an argument, I get the above error. we tested with the newest version of Automatin studio 6, CP1684,
Have you checked the actual node indentifier and the type for the object that is the parent of the method itself?
Trying to get this from your pictures this would be then possibly the ‘Package’ object. These can be checked easily with UA Expert. And are shown in the top right on your screenshot of UaExpert.