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Debugging and Troubleshooting
OpenEdge Debugger : Using System Handles for Debugging : Using the SESSION handle to start the Debugger
 

Using the SESSION handle to start the Debugger

If you want alert boxes to include a Help button that provides access to a Stack Trace dialog box and the Debugger, use the SESSION handle and set the DEBUG-ALERT attribute to TRUE. Use the following sample code if you want alert boxes to include a Help button:
SESSION:DEBUG-ALERT = TRUE.
For more information on starting the Debugger from alert boxes, see Starting and Stopping the Debugger
Note: You can enable this feature when you start an ABL client using the Debug Alert (-debugalert) startup parameter. For information on this startup parameter, see the reference entry in OpenEdge Deployment: Startup Command and Parameter Reference.