I found a means to run REXX using the following format:
"TSO %EXEC_NAME PARM", But I am not understand this exactly. Would you like to explain it more detailly, or give me some examples.
When you specify "%", you tell the system that the module is a REXX and not a load-module, so there is no search for the module in the load libraries, only in SYSPROC/SYSEXEC.