SQL Server Error: Unable to start the Transact-SQL debugger ...could not connect to Database instatnce

Hi chetan,

Step 1 : Expand the Security

Step 2 : Right click of Logins

Step 3 : Select New Login

Step 4 : Enter your windows user name (User name should be Domain\User Name)

Step 5 : Go to Server roles -> Select Public

Step 6: Go to User Mappings and select Database (Which database against you want to debug)

Step 7 : Assign role member ship as Public and DYNGRP

Step 8 : Select OK

Now try to debug it will work.

hi sir,i am getting like this

Windows NT user or group PC26/chetan not found

Refer below link.

https://social.msdn.microsoft.com/Forums/en-US/b3eec967-1749-4ac8-8802-8e996da08b0c/error-15401-windows-nt-user-or-group-not-found-check-the-name-again?forum=sqlsecurity