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The following error occurs when opening any node on the NPM Web Console with NTA module installed:
Object reference not set to an instance of an object.
When saving the error report of the page, the following error appear on logs:
URL: http://<SERVER IP>/Orion/NetPerfMon/NodeDetails.aspx?NetObject=N:<nodeID>
Referrer: http://<SERVER IP>Orion/NetPerfMon/NodeDetails.aspx?NetObject=N:<nodeID>
Message: Object reference not set to an instance of an object.
Any NPM version with NTA 4.0 and later
This can occur when there are duplicates in the NTA database.