HMC: Error HSCP0003 when "Back up HMC Data"

[rob@xxxxxxxxx]

I have two HMCs, both at 7.3.1.0 with:  MH01015, MH01030, HM01041
I'd like to upgrade them to 7.3.2.  Some of the steps I always do prior to 
the upgrade are:
- Save Upgrade Data
- Format Media
- Back up HMC Data
- continue on...
However the "Back up HMC Data", on both HMCs dies with HSCP0003  The 
Backup Critical Data request failed.

Only hit I am finding is:
http://publib.boulder.ibm.com/infocenter/systems/topic/ipha5/hmc_codes_hscp.htm?resultof=%22%68%73%63%70%78%78%78%78%22%20

Tried calling IBM software support.  But I am getting the usual runaround 
about entitlement whenever I call in about my HMCs lately.  I wonder if I 
open this as a hardware issue (which apparently I am entitled to) if I'd 
get any better results?

Rob Berendt