Thanks for the reply.
Here is the error message
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Cannot connect to servername\instancename
Additional information
A netowrk-related or instance-specific error occure while establising a connection to SQL Sevrer.
The server was not found or was not accesible.verify that the instance name is correct and that SQL Server is configured to allow remote connections(provider:SQL network Interfaces,error 26-
Error Locating Server/instance Specified)(Microsoft SQL Server)
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