ON

Opens the Trace window and suspends program execution.

SET STEP is used to debug programs. You can insert SET STEP ON in a program at the point where you'd like to execute individual commands.

For information about the Trace Window, see Testing and Debugging Applications.

You can pass parameters to a program and then trace its execution by following these steps:

1. Open the Trace window.
   
   
2. From the Trace window's Program menu, choose Open and select the program to trace.
   
   
3. Set a breakpoint on the first executable line of the program.
   
   
4. In the Command window, DO the program WITH the parameters.