Correct usage of "bptestbpcd -clear_host_cache"

Could someone please elaborate on the correct usage of the "bptestbpcd -clear_host_cache" command ?

This is what presently get when I run the following.

[root@nbu1234 ~]# /opt/openv/netbackup/bin/admincmd/bptestbpcd -clear_host_cache
Usage: /opt/openv/netbackup/bin/admincmd/bptestbpcd [-host hostname] [-client clientname]
        [-connect_options 0|1|2 0|1|2 0|1|2|3]
        [-wait_to_close seconds]
        [-verbose] [-M server]
invalid command parameter
[root@nbu1234 ~]#