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You are correct. I ended up contacting support and had to run the uninstaller and try again. Once it was reinstalled everything worked fine. I ended up having another issue where the tab for NTA gave an error about the object reference is not set to instance of an object. This required me to stop the services rename the solar winds folder under inetpub, and then restart the services.
Thank you very much for your help.
I am sorry to hear you have troubles with NTA installation. The error you have quoted is most probably caused by remnants of older NTA installation (there are some old tables left in SQL DB). To solve the problem either uninstall NTA 4.0 from NPM server, temporarily install NTA 3.8.0 and upgrade it to NTA 4.0 or contact SolarWinds support, they can provide you a tool to clean the SQL DB.