The UNLOAD command causes SMP/E to unload entries from the target zone or distribution zone to the SMPPUNCH data set. The output produced is in the form of UCL statements, which, when processed by SMP/E, re-create the unloaded entries in the distribution zone or the target zone. This function allows the user to unload selected parts of a target zone or distribution zone for initialization of entries on other zones. Do not use UNLOAD to back up a zone. Use ZONECOPY or ZONEEXPORT/ZONEIMPORT instead.