This technique is useful in large applications under development where the line numbers change constantly and you want to break at specific points in your code, regardless of how the surrounding code is modified, or you want to set breakpoints in include files that appear in many different procedures. This technique is also useful when implementing a Debugger tool in application mode, where you can set a breakpoint in a called subprocedure to indicate where debugging should start. Use this technique to start the Debugger on an AppServer to debug a remote procedure. For more information, see Remote debugging.