I've tried both logging into NRM as myself and root

I have an NCS Clustered volume (NSS)
I go into NRM, click on the:
volume and then click the icon for Volume Inventory

It comes up right away with 0% and says it's done

Is volume inventory not supported on a cluster? I would think so since DST is supported on NSS in Clustered NCS on OES2 SP2 64-bit Linux.