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I can only debug a query once, after that I get this error and have to restart Management Studio.

Unable to start T-SQL Debugging. Could not connect to computer '(local)'. The requested name is valid, but no data of the requested type was found.

Version: 10.50.1797.0

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up vote 2 down vote accepted

In the past, I have found I can only debug reliably if I connect the query window to the database using the actual machine name instead of ".".

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Looks like this works. The debugger also launches a lot faster. –  Stijn Feb 23 '12 at 8:35

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