PDQ Deploy or Inventory reports “Object reference not set to an instance of an object” or “NullReferenceException” errors. These errors are caused when the application tries to reference a variable and (unexpectedly) receives a NULL value. This can happen at seemingly random times.
This error is usually a transient error that can be fixed by a simple restart of the PDQ Server.
If you continue to see this error after a restart, then it could point to some potential performance issues. In that case, click the “Submit this issue to PDQ Support” link in the error window to start a troubleshooting ticket with our support team.