The XML file must have a root tag (error) code to solve the problem.

Change xml to the following, and then add a Document tag. put the previous two root tags SearchConstraints and StoPList under the Document tag, therefore, the XML file has only one root tag. The xml document used is as follows:

     
       
  
   glucose
        
  
   Ethanol
        
  
   name
        
        
  
    number="0">
        
        
  
   10
      
     
       
          
           
           
           
         
      
 

Problem: No root tag! The XML file can have only one root tag!
Change xml to the following, and then add a Document tag. put the previous two root tags SearchConstraints and StoPList under the Document tag, therefore, the XML file has only one root tag.

   
     
        
   
    glucose
         
   
    Ethanol
         
   
    name
         
         
   
     number="0">
         
         
   
    10
       
      
        
           
            
            
            
          
       
    
 

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