EPF Composer can be launched from within the Eclipse shell you use for development. Launching EPF from within Eclipse will allow you to control several start-up parameters, as well as set breakpoints to pause EPF Composer execution to find problems or understand how specific code works during runtime.
Open the Java or Debug perspective
Find the Run button on the tool bar
Use the cascading menu to select the Run dialog
Create a new Eclipse Application configuration
Specify the workspace information and the product identifier
Note the settings on the Main tab and the Arguments tab of the dialog
Click the Apply button when finished
Click the Run button to start EPF Composer
When EPF Composer starts it will ask you for a method library location
Use the same configuration for debugging
Remember to set breakpoints before launching a debug configuration