Just have your program delete every thing at the start. Make sure to use the d(noerr) command for the deletion so that if they don't exist no error is thrown.
However I usually just have the program open up the workfile from disk on the first line - that way I know I am getting a fresh copy each time.
However I usually just have the program open up the workfile from disk on the first line - that way I know I am getting a fresh copy each time.