Using Flex Builder 2 > Programming Flex Applications > Running and Debugging Applications > Debugging your applications > Starting a debugging session

Starting a debugging session

To begin a debugging session, you run the application's launch configuration in debugging mode.

To debug an application:

1. In the Navigator view, select the project to debug.
2. Select the Debug button from the main workbench toolbar.

   If you project isn't already built, Flex Builder builds and then runs it in debug mode.

3. Your application appears in your default web browser or the Flash desktop player and you can then use the Flex Builder debugger to interact with it.
4. When a breakpoint is reached, the Flex Debugging perspective is activated in the workbench.

Starting a debugging session in the plug-in configuration of Flex Builder

If you're using the plug-in configuration of Flex Builder, the debug command works a bit differently. Instead of running the currently selected project, it debugs the most recently launched configuration. You can also select from a list of recently launched configurations.

Related topics

• Starting a debugging session
• Setting Run/Debug preferences
• Adding and removing breakpoints
• Managing breakpoints in the Breakpoints view
• Managing the debugging session in the Debug view
• Managing variables in the Variables view
• Using the Expressions view

Flex 2.01