Earlier I wrote a blog post about how to install DQS in SQL Server 2012. Today I decided to write a second part of this series where I explain how to use DQS, however, as soon as I started the DQS client, I encountered an error that will not let me pass through and connect with DQS client. It was a bit strange to me as everything was functioning very well when I left it last time. The error of DQS Error was very big but here are the first few words of it.

Cannot connect to server.
A .NET Framework error occurred during execution of user-defined routine or aggregate “SetDataQualitySessions”:
System.Data.SqlClient.SqlException (0x80131904): A .NET Framework error occurred during execution of user-defined routine or aggregate “SetDataQualitySessionPhaseTwo”:

The error continues – here is the quick screenshot of the error.