Oh, I see. Thank you for explanation.

As you probably understand, the error is actually not coming from the client application at all. It is being logged on the OPC UA server side. "OpcLabs.EasyOpc.UA.Implementations.NetSdk.EasyUASession;5.53.405.1@PC363/13432:1;2891" is an OPC UA session name that we pass from the client to the server, and the server is including it in the event so that it identifies the client that it relates to.

But I do not know what the error means and what causes it. You need to ask the server vendor. It is somewhat weird that it has the string "user , item" at the end - does that indicate no user, and perhaps no valid node Id? But again, it's reported by the server, and it is server-specific, so it's their turn to explain it.

What is not clear to me is whether you are actually having a problem (the application does not work as expected), or whether the application appears to work well, and you are just trying to figure what the errors in the event log mean.

Note: The server may (and usually will ) indicate a problem during reading by setting a "Bad" status status in the DataValue sent to client. In such case, the indication of it will be inside the UAAttributeData that you get from the Read call, but there will be no exception thrown. Are you checking the status of UAAttributeData?

Best regards

Hello,

can you please provide more information about the exception? I think what you have written is neither precise nor complete. Use Copy/Paste.

I need:
- The precise full text of the exception message
- The exception call stack
- If there is an inner exception (.InnerException property), then its type, its precise full text, and its call stack, and so on, recursively.

Thank you