Unable to start T-SQL debugging. cocould not connect to the computer '.'

Unable to start T-SQL debugging. cocould not connect to the computer '.'

 

Connect to SQL Server using SSMs on win7 and use the debug function, but the following error occurs:

 

 

 

Unable to start T-SQL debugging. cocould not connect to the computer '.'

 

If you do not use the debug function to connect with SSMs and execute SQL statements, there is no problem. Then try to use Server
The name connection is normal.

 

View the instructions for configuring the transact-SQL debugger.
SQL Server Management studio or SQL server data tools and SQL Server
If the database engine instance runs on the same computer, there is no configuration requirement for running the transact-SQL debugger. "Because I am connected to the local machine, no additional configuration is required.

 

The root cause is still not found.