anchor.diff:  
   handle_call({_, recv_chunk}, _, #state{chunk = false} = State) ->
       {reply, {error, "ftp:recv_chunk_start/2 not called"}, State};
  -
  +handle_call({_, recv_chunk}, _From, #state{chunk = true,
  +                                           data = Bin,
  +                                           caller = #recv_chunk_closing{dconn_closed       = true,
  +                                                                        pos_compl_received = true,
  +                                                                        client_called_us = true
  +                                                                       } 
  +                                          } = State0) ->
  +    case Bin of
  +        <<>> ->
  +            {reply, ok, State0#state{caller = undefined,
  +                                     chunk = false,
  +                                     client = undefined}};
  +        Data ->
  +            {reply, Data, State0}
  +    end;
   handle_call({_, recv_chunk}, _From, #state{chunk = true,
                                              caller = #recv_chunk_closing{dconn_closed       = true,
                                                                           pos_compl_received = true
  
positive.code:         {error, _What} ->
              {reply, {error, epath}, State}
      end;
  
  handle_call({_, {recv_bin, RemoteFile}}, From, #state{chunk = false} =
              State) ->
      setup_data_connection(State#state{caller = {recv_bin, RemoteFile},
                                        client = From});
  
  handle_call({_,{recv_chunk_start, RemoteFile}}, From, #state{chunk = false}
              = State) ->
      setup_data_connection(State#state{caller = {start_chunk_transfer,
  
negative.code:         _ ->
              {reply, {error, etype}, State0}
      end;
  handle_call({_,{recv, RemoteFile, LocalFile}}, From,
              #state{chunk = false, ldir = LocalDir} = State) ->
      progress_report({remote_file, RemoteFile}, State),
  