samba - Nov 2013 - Prepopulate *all* users to a samba4 RODC

I was hoping this would be simpler. I'd like to prepopulate an RODC with 
all users accounts that are permitted. But I can only pre-populate one 
at a time:
samba-tool rodc preload (<SID>|<DN>|<accountname>)

sles-shire:~ # samba-tool group listmembers 'Allowed RODC Password 
Replication Group - Shire'
Allowed RODC Password Replication Group - Global
WIN7-SHIRE$
bilbo
sles-shire:~ # samba-tool group listmembers 'Allowed RODC Password 
Replication Group - Global'
frodo

I'll have to do some sort of smart enumeration here.

Before I write a script to do so (or better, add functionality into the 
samba-tool rodc command to prepopulate an entire group), does this 
functionality already exist somewhere?

M.

-- 
Michael Brown               | `One of the main causes of the fall of
Systems Consultant          | the Roman Empire was that, lacking zero,
Net Direct Inc.             | they had no way to indicate successful
?: +1 519 883 1172 x5106    | termination of their C programs.' - Firth

Ack, I'm having trouble replicating *one*:

sles-shire:/home/michael # samba-tool rodc preload 'WIN7-SHIRE$' 
--server main.adlab.netdirect.ca
Replicating DN 
CN=WIN7-SHIRE,CN=Computers,DC=main,DC=adlab,DC=netdirect,DC=ca
ERROR(<type 'exceptions.TypeError'>): uncaught exception -
__init__()
takes exactly 6 arguments (5 given)
   File "/usr/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
line 175, in _run
     return self.run(*args, **kwargs)
   File "/usr/lib64/python2.6/site-packages/samba/netcmd/rodc.py",
line
94, in run
     repl = drs_Replicate("ncacn_ip_tcp:%s[seal,print]" % server, lp, 
creds, local_samdb)
A transaction is still active in ldb context [0xd614f0] on 
tdb:///var/lib/samba/private/sam.ldb

sles-shire:/home/michael # samba-tool rodc preload 'michael' --server 
main.adlab.netdirect.ca
Replicating DN CN=Michael 
Brown,OU=Main,OU=Offices,DC=main,DC=adlab,DC=netdirect,DC=ca
ERROR(<type 'exceptions.TypeError'>): uncaught exception -
__init__()
takes exactly 6 arguments (5 given)
   File "/usr/lib64/python2.6/site-packages/samba/netcmd/__init__.py",
line 175, in _run
     return self.run(*args, **kwargs)
   File "/usr/lib64/python2.6/site-packages/samba/netcmd/rodc.py",
line
94, in run
     repl = drs_Replicate("ncacn_ip_tcp:%s[seal,print]" % server, lp, 
creds, local_samdb)
A transaction is still active in ldb context [0xd614f0] on 
tdb:///var/lib/samba/private/sam.ldb

Any ideas?

M.

-- 
Michael Brown               | `One of the main causes of the fall of
Systems Consultant          | the Roman Empire was that, lacking zero,
Net Direct Inc.             | they had no way to indicate successful
?: +1 519 883 1172 x5106    | termination of their C programs.' - Firth