The following DD statements may be required:
- SYSTSIN
- For the data set that contains input to the REXX exec. It can be an instream data set.
- SYSTSPRT
- For the data set that contains output from the exec.
- SYSEXEC
- SYSPROC
- If the exec is a member of a PDS.
You must also include any DD statements for data sets that are accessed by the exec.