How to initiate image clean up manually

How to initiate image clean up manually against all media server.

#/usr/openv/netbackup/bin/admincmd/bpimage -cleanup -allclients

NBU 7.X: All UNIX 32-bit system support has been discontinued

 From the NetBackup 7.0 Release Notes: "...
All UNIX 32-bit system support has been discontinued. To upgrade these systems to NetBackup 7.0, you must first migrate your current NetBackup 6.x catalogs and databases to a system with a supported platform. However, 32-bit media servers and clients that use NetBackup 6.x are compatible with 64-bit master servers that use NetBackup 7.0.