anchor.diff:      case dbus_proxy:call(Backend, ?IFACE_BACKEND, <<"Get">>, [Location]) of
   	{ok, [KindId, MixinIds, Attributes, Owner, Group, Serial]} ->
   	    Entity = unmarshal_entity(KindId, MixinIds, Attributes),
  -	    {{ok, [Entity, Owner, Group, unmarshal_serial(Serial)]}, S};
  -	{error, _}=Err ->
  -	    {Err, S}
  +	    {{ok, [Entity, unmarshal_user(Owner), unmarshal_user(Group), unmarshal_serial(Serial)]}, S};
  +	{error, Err} ->
  +	    dbus_errors(Err, S)
       end.
   
   
  
positive.code: 	{ok, [KindId, MixinIds, Attributes, Serial]} ->
  	    Entity = unmarshal_entity(KindId, MixinIds, Attributes),
  	    {{ok, Entity, unmarshal_serial(Serial)}, S};
  	{error, _}=Err ->
  	    Err
      end.
  
  
  
negative.code: -record(state, { conn       :: dbus_connection(),
  		 proxy      :: dbus_proxy() }).
  
  -define(dbus_exception_notfound, <<"org.ow2.erocci.backend.NotFound">>).
  -define(dbus_exception_conflict, <<"org.ow2.erocci.backend.Conflict">>).
  
  %%%===================================================================
  %%% occi_backend callbacks
  %%%===================================================================
  