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NodeId at PublishResponse
June 1, 2022
10:29, EEST
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Oleksandr
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Hello,
We have the problem that the value change is not recognized by our OPC UA client barring on Prosys SDK. We recorded the wireshark logs for this. How can I find out in the wireshark log at PublishResponse which NodeId has changed?
Regards,
Oleksandr Perederiy

June 1, 2022
11:50, EEST
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Matti Siponen
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Hello,

PublishResponses do not use NodeIds in MonitoredItemNotifications to identify which Node the reported notification is related to. Instead they use ClientHandles of MonitoredItems which are assigned by the Client in CreateMonitoredItemsRequest. So to debug PublishResponses, you will first need to check the CreateMonitoredItemsRequests to indentify the relationships between ClientHandles and NodeIds. The ClientHandles are available in CreateMonitoredItemsRequests and PublishResponses respectively in the following “paths”:

CreateMonitoredItemsRequest > ItemsToCreate > RequestedParameters > ClientHandle
PublishResponse > NotificationMessage > NotificationData > DataChangeNotification > MonitoredItems > ClientHandle

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