title: Unable to start the Transact-SQL debugger, could not connect to the database engine instance
body: <p>I have been trying to run debugging within SQl server management studio and for some reason the debugger has just stopped working.</p>
  <p>This is the message I get:</p>
  <blockquote>
  <p>Unable to start the Transact-SQL debugger, could not connect to the
  database engine instance 'server-sql'. Make sure you have enabled the
  debugging firewall exceptions and are using a login that is a member
  of the sysadmin fixed server role. The RPC server is unavailable.</p>
  </blockquote>
  <p>Before this I get two messages, one requesting firewall permissions and the next says 'usage' with some text that makes little sense.</p>
  <p>I have looked at the other similar answers on there for the same message which suggest adding the login as a sysadmin but that is already set. I also tried adding sysadmin to another account but that also didn't work.</p>