Access violation after reading data

[Phil]

HI,

i am using the c++ builder to read data from a xml file. i have build me a little example and i can read between two tags. problem is only that i get an access violation, after finishing.

i am using this little xml file:

<?xml version="1.0" encoding="UTF-8"?>
<product>
<a001>A30</a001>
<a002>03</a002>
</product>

and here my function to read the data:

bool __fastcall ParseXML()
{  
   TiXmlDocument doc("c:\\test.xml");
   doc.LoadFile();
   TiXmlHandle handle(&doc);
   TiXmlText *result;

   // save the data here
   AnsiString uniqueid = "";

   // get the data
   result = handle.ChildElement("product", 0).ChildElement("a001", 0).FirstChild().Text();
   if (result)
   {
      uniqueid = result->Value();
   }

   ShowMessage(uniqueid);

   delete result;
   return true;
}

ansistring is a c++ builder string type. everythings works fine, but after the ShowMessage function, i get this access violation.

my compiler switch to tinyxml.cpp to line 646. this line contains Clear(); It is in the

void TiXmlElement::ClearThis() function.

Could anybody tell me why i get this violation. Is there anything missing in my code?

Phil

[Ellers]

I'm fairly sure that you don't own the result variable above, so deleting it is a mistake.

Text() returns a pointer to the internal string within the node. Therefore, when the document goes out of scope, and the tree cleans itself up, it naturally deletes the data it owns.

At least, I'm fairly sure about this...

HTH
Ellers

[Phil]

hi ellers,

this was the problem. when i comment out

delete result;

it works fine. i dont know why i use a delete, it was wont :)

Phil