This command duplicates reference objects in the production library, often used to mirror test or development objects for validation, comparison, or rollback. It’s like cloning a reliable object into production without initiating a full deployment process.
DUPREFOBJ OBJ(name) LIB(source-lib) TOLIB(prod-lib) TYPE(*PGM | *FILE | etc.)
OBJ(name): Name of the object to duplicate.
LIB(source-lib): Library where the original object resides.
TOLIB(prod-lib): Target production library.
TYPE(...): Object type (e.g., *PGM, *FILE, *SRVPGM).
When to Use It
To stage reference objects in production for testing or validation.
As part of a rollback strategy—keeping a backup copy of a known-good version.
To compare production vs development versions using tools like
CMPSRCMBR.
