The data accumulated by a history report is purged using the PH command.
To purge accumulated history data
From the History Reports screen, enter the EX command to expand the list so that all occurrences for the particular report are displayed.
From the expanded list, select the occurrence you want to delete, type the PH command on the selection line preceding the report name, and press ENTER.
Depending on the setting in your profile, you may be prompted to confirm the purge request.
Confirm the purge request, if required.
