[Q] Backing up ROM on LG LS 620 Realm

I have an LG LS620 Realm that I have rooted using towelroot and have verified that I have root access.
I am trying to backup my current ROM before I do anything so I have something to go back to and when I use any of the programs that everyone recommends for ROM management the phone boots into the Recovery screen and I get the following screen

Android system recovery <3e>

E:missing bitmap stage_empty
(code -1)
E:missing bitmap stage_fill
(code -1)
manual select menu

From here it gives me the following options
Reboot system now
apply update from external sd card
apply update from cache
apply update from ADB
wipe data/factory reset
wipe cache partition

Im trying to make a ROM backup and have tried it using ROM toolbox, Nandroid Manager, TWRP Manager, Clockworkmod ROM manager

any help getting this ROM backed up would be appreciated.

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