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copied!<p>Make sure that</p> <pre><code>TiXmlDocument getDocument () { return this->_document; } </code></pre> <p>Will not deep copy its contained TiXmlElement's. Otherwise you return a temporary, use that in the constructor to set the root node, which then will be destructed already. I haven't looked in its API, but just be aware of such pitfalls. </p> <p>The reason for the ambiguous call is because:</p> <p>There are three overloads of <code>FirstChildElement</code> taking one argument:</p> <pre><code>const TiXmlElement * FirstChildElement (const char *value) const // :1 const TiXmlElement * FirstChildElement (const std::string &_value) const // :2 TiXmlElement * FirstChildElement (const std::string &_value) // :3 </code></pre> <p>You access the TiXmlElement through <code>TiXmlElement&</code> (using a <code>TiXmlElement*</code> pointer). But the version taking a <code>const char*</code> has an implicit object parameter of <code>TiXmlElement const&</code>. That is, a qualification conversion is required to make the call work. For the other versions taking a <code>std::string const&</code>, there are conversions required too:</p> <pre><code><implied obj param> <implicit obj param> <arg1> <param1> TiXmlElement& TiXmlElement const& char const* char const* // :1 TiXmlElement& TiXmlElement const& char const* std::string const& // :2 TiXmlElement& TiXmlElement& char const* std::string const& // :3 </code></pre> <p>There is an ambiguity between the first and the third overload. An easy fix is to do</p> <pre><code>this->setDialogsElement( this->getRootElement()->FirstChildElement(std::string("dialogs"))); </code></pre> <p>Instead, which will call the last version. Another fix is to const_cast:</p> <pre><code>this->setDialogsElement( const_cast<TiXmlElement const*>(this->getRootElement())-> FirstChildElement("dialogs")); </code></pre> <p>Which will call the first version. As for why it only happens in DEBUG... I remember that TiXML has an option to disable the use of the STL. Maybe in release mode you disabled it (and thus the overloads taking <code>std::string</code>), but in debug mode you forgot?</p>

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