Exchange plan error

Hello Timofey.

I`m getting the following error when I try to execute exchange mechanism beetween server and mobile.

On the server in the web service is all ok, function for sending data is executing.

Function in the web service module for sending data to mobile is:

Code

Function PerformExchange(DeviceCode, DeviceData)
   SetPrivilegedMode(True);
   
   //1. Initialization (if necessary)
   ExchangeNode = ExchangePlans.Mobile.ThisNode().GetObject();
   If Not ValueIsFilled(ExchangeNode.Code) Then
      ExchangeNode.Code="001";
      ExchangeNode.Description="Main";
      ExchangeNode.Write();
   EndIf;
   
   ExchangeNode = ExchangePlans.Mobile.FindByCode(DeviceCode); 
   If ExchangeNode.IsEmpty() Then
      NewNode = ExchangePlans.Mobile.CreateNode();
      NewNode.Code = DeviceCode;
      NewNode.Description = DeviceCode;
      NewNode.Write();
      RecordDataChanges(NewNode.Ref);
      ExchangeNode = NewNode.Ref;
   EndIf;
   
   
   //2. Retrieving data from the mobile device
   ExchangeNode = ExchangePlans.Mobile.FindByCode(DeviceCode); 
   XMLReader = New XMLReader;
   XMLReader.SetString(DeviceData.Get());
   MessageReader = ExchangePlans.CreateMessageReader();
   MessageReader.BeginRead(XMLReader);
   ExchangePlans.DeleteChangeRecords(MessageReader.Sender,MessageReader.ReceivedNo);
   BeginTransaction();
   While CanReadXML(XMLReader) Do
      Data = ReadXML(XMLReader);
      If Not Data = Undefined Then
         Data.DataExchange.Sender = MessageReader.Sender;
         Data.DataExchange.Load = True;
         Data.Write();
      EndIf;
   EndDo;
   CommitTransaction();
   MessageReader.EndRead();
   XMLReader.Close();
   
   
   //3. Exporting data to the mobile device
   ExchangeNode = ExchangePlans.Mobile.FindByCode(DeviceCode); 
   XMLWriter = New XMLWriter;
   XMLWriter.SetString("UTF-8");
   XMLWriter.WriteXMLDeclaration();
   MessageWriter = ExchangePlans.CreateMessageWriter();
   MessageWriter.BeginWrite(XMLWriter, ExchangeNode);               
   XMLWriter.WriteNamespaceMapping("xsi", "http://www.w3.org/2001/XMLSchema-instance");
   XMLWriter.WriteNamespaceMapping("v8",  "http://v8.1c.ru/data");
   ChangeSelection = ExchangePlans.SelectChanges(ExchangeNode, MessageWriter.MessageNo);//, Users.GetExchangePermissionsFilter(SystemUser));
   While ChangeSelection.Next() Do
      Data = ChangeSelection.Get();
      WriteXML(XMLWriter, Data);// Writing data to the message
   EndDo;
   MessageWriter.EndWrite();
   Return New ValueStorage(XMLWriter.Close(), New Deflation(9));
   
EndFunction

On the mobile when processing server response i`m getting the following error

"Error setting value of context attribute(Sender)".

Can you please help me to fix this?

The function is:

Code

&AtServer
Procedure ExecuteDataExchange() Export
   
   
   Address = Constants.ServerAdress.Get();
   
   Definitions = New WSDefinitions(Address,"admin", "admin");
   URI = "http://localhost/ws1";
   Proxy = New WSProxy(Definitions, URI, "WebExchange", "WebExchangeSoap");
   Proxy.User = "admin";
   Proxy.Password = "admin";
   
   SysInfo = New SystemInfo;
   MobileDeviceCode = String(SysInfo.ClientID);
   
   //1. Initialization (if necessary)
   Node = ExchangePlans.Mobile.ThisNode();
   If Not ValueIsFilled(Node.Code)
      Or Node.Code <> MobileDeviceCode Then
      NodeObject = Node.GetObject();
      NodeObject.Code = MobileDeviceCode;
      NodeObject.Description = MobileDeviceCode;
      NodeObject.Write();
   EndIf;
   
   MainExchangeNode = ExchangePlans.Mobile.FindByCode("001");
   If MainExchangeNode.IsEmpty() Then
      NewNode = ExchangePlans.Mobile.CreateNode();
      NewNode.Code="001";
      NewNode.Description="Main";
      NewNode.Write();
      MainExchangeNode = NewNode.Ref;
   EndIf;   
   
   //2. Exchange with the main base
   ExchangeData = Proxy.PerformExchange(MobileDeviceCode, GenerateExchangePackage(MainExchangeNode));   
   
   
   //3. Processing data received from the main base
   XMLReader = New XMLReader;
   XMLReader.SetString(ExchangeData.Get());
   MessageReader = ExchangePlans.CreateMessageReader();
   MessageReader.BeginRead(XMLReader);
   ExchangePlans.DeleteChangeRecords(MessageReader.Sender,MessageReader.ReceivedNo);
   BeginTransaction();
   While CanReadXML(XMLReader) Do
      Data = ReadXML(XMLReader);
      If Not Data = Undefined Then
         Message(MessageReader.Sender);
         Data.DataExchange.Sender = MessageReader.Sender;
         Data.DataExchange.Load = True;
         Data.Write();
      EndIf;
   EndDo;
   CommitTransaction();
   MessageReader.EndRead();
   XMLReader.Close();
   
EndProcedure

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