Domain rename under Windows Server 2008 R2

What does the message "Failed to prepare pdc.olddomain.local : 5" mean when running "rendom /prepare" ?

This is the setup: There are several servers, all running as VMs under server 2008 R2 hosted hyper-V. All servers are running. There are two DCs (called pdc and bdc).

This is what I did:

on PDC, I created new forward lookup zone for

I created another 2k8R2 server for the "control station" and added the Remote Server Admin Tools feature.

on the control station, copied Rendom.exe, Repadmin.exe, Dfsutil.exe, and Gpfixup.exe to a temporary folder, but running rendom from that folder gets "unable to load resource string 1067", so I followed the advice in and run rendom by "c:\windows\system32\rendom ..."

"rendom /list" produces the expected xml file which I edited, changing three instances of "olddomain.local" to "" and one (NetBIOS) of OLDDOMAIN to NEWDOMAIN.

"rendom /showforest" shows changes are correct and complete.

"rendom /upload" creates a dclist.xml which correctly contains both domain controllers

"rendom /prepare" then returns "Failed to prepare pdc.olddomain.local : 5". Retrying produces the same result again

I tried "c:\windows\system32\repadmin.exe /bind pdc.olddomain.local" (and bdc) as suggested by - both succeed, but have no beneficial effect.

I do note that p.1055 of Minasi's "Mastering Windows Server 2008 R2" includes in prerequisites the need for a stand-alone DFS server which we don't have. But I haven't seen that prerequisite anywhere else including on Technet, so I'm far from sure that we need it.

So what am I meant to do with the rather unhelpful "Failed to prepare pdc.olddomain.local : 5"
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usually Error 5 is Access is Denied.

run net helpmsg 5 and you will see

did you run the cmd as administrator ?
peterpanicAuthor Commented:
Yes, logged in as, and therefore (presumably) running as, administrator.
right click on command prompt and run-as administrator
peterpanicAuthor Commented:
Yes, I have tried running cmd.exe as administrator. No change - it still fails with identical results.
peterpanicAuthor Commented:
I've given up and rebuilt the domain members from scratch

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Windows Server 2008

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