net groupmap add: Can't lookup UNIX group

[Alex Deiter]

I'm running samba-3a24 and see errors on create a new group mapping:

# net groupmap add rid=10000 unixgroup=wheel type=domain
Can't lookup UNIX group

# id 
uid=0(root) gid=0(wheel) groups=0(wheel), 5(operator)

if gid>0, all ok:

# net groupmap add rid=20000 unixgroup=operator type=domain
Successully added group operator to the mapping db

# net groupmap list
operator (S-1-5-21-1895337680-650492932-374016306-20000) -> operator

Any ideas ?

Thanks!