Hi,
From the Debugger, you can set the debugging mode and the system behavior in the event of a kernel warning by choosing Settings.
<b>System Debugging</b>
If you set this option, the Debugger is also activated for system programs (programs with status S in their program attributes). When you save breakpoints, the System Debugging setting is also saved.
<b>Update Debugging</b>
Update function modules do not run in the same user session as the program that is currently running in the ABAP Debugger. These function modules are therefore not included in debugging. Only if you select the Update Debugging option can you display and debug them after the COMMIT WORK.
<b>In Background Task: Do not Process</b>
When you debug a program that calls function modules using the IN BACKGROUND TASK addition, they are processed in a background work process (additional internal session). If you set the In background task: Do not process option, the system collects the function calls, but does not start the background work process. The Debugger assigns a transaction ID, which identifies the background work process uniquely. You can now start the Debugger for the background work process using transaction SM58. You can select the function module concerned here, and then execute it via the Edit menu.
Regards
Sudheer