TinyXML TiXmlDocument::StreamOut unresolved at link time

Question

Using TinyXML with TIXML_USE_STL (anyway doesn't change behavior)

My code

   TiXmlDocument doc(pszFileName);
   bool loadOkay = doc.LoadFile();
   if (!loadOkay) {_ASSERTE(0); return(0);}

I just got one and only one unresolved:

unresolved external symbol "public: virtual void __thiscall TiXmlDocument::StreamOut

The method is pure virtual in the TiXmlBase class and it look look like once derived in TiXmlDocument it was forgotten to implement one.

Are users forced to implement their own ?

Feel that weird!

I haven't seen this being mention anywhere.

=========================== Solved =======================

The solution I got had 2 different version of tinyxml 2.4.5 and 2.5.1 the header must not be mixed. Looks like upgrade to latest version is not an option.(in my case)