anchor.diff:  %%% be disconnected from those nodes not yet been upgraded.
   %%%====================================================================================
   handle_call({global_groups_changed, NewPara}, _From,
  -            #state{rpc_requests = Reqs,
  +            #state{erpc_requests = Reqs,
                      nodes = OldNodes,
                      connections = Conns} = S) ->
   
  
positive.code:             %% no action taken...
              S
      end;
  handle_rpc_response(_, _, {nodeup_conf_check, Node, ReqCId},
                      #state{connections = Conns} = S) ->
      case maps:get(Node, Conns, undefined) of
          CId when ReqCId == CId orelse (ReqCId == not_connected
                                         andalso is_integer(CId)) ->
  
negative.code:             %% no action taken...
              S
      end;
  handle_erpc_response(error, nodedown, {ng_add_check, Node, ReqCId},
                       #state{connections = Conns} = S) ->
      case maps:get(Node, Conns, undefined) of
          CId when ReqCId == CId orelse (ReqCId == not_connected
                                         andalso is_integer(CId)) ->
  