The new ABAP Debugger is executed in its own external mode, while the application which is being debugged (debuggee) uses a different mode. This is two tier architecture that is the new debugger is displayed in its own GUI window. The debuggee is inactive while the debugger is active and vice versa that is debugger remains available in inactive mode when the program displays its final output. The debugger does not close while the application which is being debugged is still alive.
The classic ABAP debugger is displayed in the same window as the application.
The new Debugger provides more flexible interface than classic, which can be configured in multiple ways as required.
