samba - Jan 2009 - smbcacls -- ERROR: unable to open credentials file!

Hello All,

Tried googling for more info on this...none found.

When i try to run 

smbcacls //host/share/file.txt -A ACL:user:ALLOWED/0/RWX

the ff error message is returned:

ERROR: Unable to open credentials file!


   There seems to be no mention of the credentials file in the samba docs or man
pages; i've also looked into the smbcacls.c source code, no mention of it as
well.

   Can anyone point me into the general direction of a solution to this? tia