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DQS Error after CU Upgrade

Posted by Diego em Setembro 20, 2013

    I recently installed SQL Server 2012 SP1 CU5 upgrade and that made DQS to stop working.  I was getting a message saying:


An error occurred in the Microsoft .NET Framework while trying to load assembly id 65581.


    That redirected me to this Microsoft page ( that explained that after you have installed a SQL Server update (patch, hotfix, or cumulative update) on a previously configured DQS instance, you might have to upgrade the DQS databases schema by running the DQSInstaller.exe file with the upgrade command line parameter by running:

dqsinstaller.exe -upgrade


Which presented me with the message


DQS version is up to date, no upgrade scripts will be run.


After this, the error message changed to: 

A new version of .NET or Data Quality Services was installed on this machine. In order to continue to work with DQS please run ‘DqsInstaller.exe -upgrade’.


Obliviously that didn’t fix the issue so I had to recompile the .NET assemblies by running:



Uma resposta to “DQS Error after CU Upgrade”

  1. Diego said

    FYI, the correct command is:
    dqsinstaller -upgradedlls

    it has to be lowercase

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