. Complete correctly: A REXX program (or REXX EXEC) called DEMO is stored in the partitioned dataset TBISUSR.REXXCRS.EXEC. Execution is possible...
... via the TSO command: EXEC 'TBISUSR.REXXCRS.EXEC(DEMO)' EXEC
...only after allocation of the partitioned dataset TBISUSR.REXXCRS.EXEC to the DD
... via the TSO command: CALL 'TBISUSR.REXXCRS.EXEC(DEMO)'
... only after compilation to COBOL, and via the TSO command