Rarely-asked Questions

• When running REXX from TSO in batch, it may be necessary to include the following command: x = PROMPT('ON') if a TSO command will need to accept input from the REXX data stack. This command also enables the PROMPT option for TSO commands executed in the REXX environment.
• Including SIGNAL ON NOVALUE at the beginning of a REXX program will trap undefined variables and prevent REXX from assigning the default value, the variable name in upper case, to an undefined variable. To use this specification, all strings must be properly quoted.

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