Whole Function:
Qt Code: 
  1. bool FieldModel::updateNode(QDomNode node,QString parent){
  2.  
  3. 	QDomElement rootOfTag=fieldState.firstChild().firstChildElement(parent);
  4. 	QDomNodeList sameTags=rootOfTag.elementsByTagName(node.firstChild().toElement().tagName());
  5. 	for(uint i=0;i<sameTags.length();i++){
  6. 		QDomNode nodeToReplace=sameTags.item(i);
  7. 		if(nodeToReplace.toElement().attribute("id")==node.firstChild().toElement().attribute("id")){
  8. 			rootOfTag.removeChild(nodeToReplace);
  9. 			qDebug()<<"Hello:\n"<<fieldState.toString();
  10. 			return true;
  11. 		}
  12. 	}
  13. 	insertNode(node,parent);
  14. 	return true;
  15. }
To copy to clipboard, switch view to plain text mode 

Its output from line 9.

Qt Code: 
  1. Hello:
  2.  "<FieldState>
  3.  <Blocks>
  4.   <Block id="3T">
  5.    <OccupiedState>1</OccupiedState>
  6.    <TanzimState>0</TanzimState>
  7.    <ProtectionState>0</ProtectionState>
  8.    <FailureState>0</FailureState>
  9.   </Block>
  10.   <Block id="001BT">
  11.    <OccupiedState>1</OccupiedState>
  12.    <TanzimState>0</TanzimState>
  13.    <ProtectionState>0</ProtectionState>
  14.    <FailureState>0</FailureState>
  15.   </Block>
  16.  </Blocks>
  17.  <Switches/>
  18.  <Signals/>
  19.  <LevelCrossings/>
  20.  <Routes/>
  21. </FieldState>
  22. "
To copy to clipboard, switch view to plain text mode 

fieldState is Class member and it is fine.