问题：delphi的RecordNodeList读取XML出错（读取XML子节点时，把多个子节点赋值给RecordNodeList出错），
RecordNodeList有大小限制吗？XML文件的其中子节点少就可以读取，多了读取就报错，是别的原因吗？  

代码：
function TTables.getTableFields(TableName:string):TVirtualTable;
var
 RootNodeList,RecordNodeList:IXMLNodeList;
 TableNode:IXMLNode;
 MyTf:TFields;
 i,m:Integer;
 SrcTN,DestTN,WellFN:string;
begin
 Result:=nil;
  RootNodeList:=MyXmlDoc.DocumentElement.ChildNodes;
  if RootNodeList.Count>0 then
  begin
   TableNode:=RootNodeList.FindNode(TableName);
   if TableNode.HasChildNodes then
   begin
     try
      Result:=TVirtualTable.Create(nil);
         Result.Active:=True;
     except
       FreeAndNil(result);
       raise TmyException.Create('虚拟表建立错误',self);
       exit;
     end;
     BuildFields(Result);

      DestTN:=TableNode.Attributes['DEST'];
     SrcTN:=TableName;
     WellFN:=TableNode.Attributes['WELLFIELD'];
     if TableNode.HasChildNodes then
     begin
       RecordNodeList:=TableNode.ChildNodes;   //在这个地方报错了（判断JJBSJ下面有字节点后，把子节点赋值给RecordNodeList时报错）
        m:=RecordNodeList.Count;
       for i:=0 to m-1 do
       begin
        TableNode:=RecordNodeList[i];
        Result.Append;
        Result.FieldByName('SrcTableName').AsString:=SrcTN;
        Result.FieldByName('DestTableName').AsString:=DestTN;
        Result.FieldByName('WellNameFieldName').AsString:=WellFN;
        Result.FieldByName('SrcFieldName').AsString:=TableNode.Attributes['SRC'];
        Result.FieldByName('DestFieldName').AsString:=TableNode.Attributes['DEST'];
        Result.FieldByName('FiledType').AsString:=TableNode.Attributes['TYPE'];
        Result.FieldByName('FieldLen').AsInteger:=strtoint(TableNode.Attributes['LEN']);
        Result.FieldByName('IsKey').AsBoolean:=strtobool(TableNode.Attributes['ISKEY']);
       end;


     end;

   end;
  end ;
end;