anchor.diff:                  {M,F} -> % echo_view_config:vrnodes_by_cname
                       case rpc:call(RPCNode, M, F, [NodeSpec]) of
                           {badrpc, _} -> 
  -                            {error, badrpc_error_msg(RPCNode)};
  +                            {error, badrpc_error_msg(RPCNode, "while getting node from nodeinfo")};
                           N when is_atom(N) ->
                               {ok, N};
                           [N|_] = Ns when is_atom(N) ->
  
positive.code:         {error, _} = Error -> Error;
          {ok, Node} ->
              case rpc:call(Node, M, F, A) of
                  {badrpc, _} -> {error, badrpc_error_msg(Node)};
                  {error, _} = Error -> Error;
                  Res -> {ok, Res}
              end
  
negative.code:             end
      end.
  
  badrpc_error_msg(Node, Where) -> 
      NodeStr = replayer_utils:term_to_string(Node),
      "badrpc for node " ++ NodeStr ++ " " ++ Where.
  
  
  override_params(ReqTS, Str) ->
  