QDomNode replaceChild is not work

[lucasbemo]

Hi,

I'm trying to use the code below, but I have not had success. Could anyone help me?
NewCode this object always null. : /

QDomNode *oldNode = &this->documento.childNodes().at(2).childNodes().at(4).childNodes().at(0).childNodes().at(indiceLinhaAtual);
                QDomNode newNode = this->documento.childNodes().at(2).childNodes().at(4).childNodes().at(0).replaceChild( nodeAux, *oldNode);

QDomNode *oldNode = &this->documento.childNodes().at(2).childNodes().at(4).childNodes().at(0).childNodes().at(indiceLinhaAtual);
                QDomNode newNode = this->documento.childNodes().at(2).childNodes().at(4).childNodes().at(0).replaceChild( nodeAux, *oldNode);

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