VS Debugger seems to hang when you start debugging

Source: Microsoft Support
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Action
Create a simple MFC application in Visual Studio 2003 / 2005/ 2008. Start debugging by pressing F5.
Result
Visual Studio debugger takes a long time to start debugging the application.  This gives an impression that Visual Studio has hung.
Cause


Invalid symbol path location, or a geographically distant location where symbols are stored, causing high network latency.


 















Resolution
Check if the _NT_SYMBOL_PATH environment variable contains valid information.

In the Visual Studio IDE, goto Tools->Options->Debugging->Symbols->Symbol File (.pdb) locations. Check if you have valid path here.

If you do have a valid path in either of these locations, try removing these entries to see if that helps.  If the problem goes away, then you may have a high network latency causing delayed load of symbols and slow debugger startup/response times.
More Information
When the debugger starts up, it tries to load the PDB symbol files for loaded modules.  High network latency can cause Visual Studio to become unresponsive.  A local symbol cache can be used to work around the problem.
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Properties

Article ID: 951336 - Last Review: 04/04/2008 20:45:05 - Revision: 1.1

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