Protect the source code of a REXX program

To protect the source code for a REXX program you must "compile" it in one 
way or another (see "Compiling" REXX programs) and you must use the 
following statement as first statement in your program 

 
  dummy = trace( 'OFF' )

This is necessary to prevent the single-step execution even if the 
environment variable RXTRACE is set to ON (see Special environment 
variables for REXX programs).