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What could be causing the error message "Object reference not set to an instance of an object"?

Question asked by Emmanuel02 on Sep 17, 2020
Latest reply on Sep 17, 2020 by James Devine


   PI Datalink is not working correctly in excel. I can not search for any tag and also PI Builder can't connect to the server. When searching for a tag or trying to connect, an error message is shown displaying the following: 



Troubleshooting steps taken so far:

  • I had an older version of PI, so I tried uninstalling all applications related to PI and installing the latest version.
  • I checked the connections in About PI SDK. Connections seem to be working as expected.
  • In excel, add ins were checked and all add-ins related to PI are enabled and working.


What could be causing this problem, and is there a way to fix it?