c++ - Reading XML: How to catch exceptions from ticpp::LoadFile()? -

i trying read xml file using ticpp::loadfile(); not successfull , did not know why because have no idea how catch exceptions. here did:

try {     // load document     ticpp::document doc( pfilename );     doc.loadfile();      // element chaining calls - no return values check, no tixmlhandle     ticpp::element* pelem = doc.firstchildelement()->nextsibling();      // useful here } catch( ticpp::exception& ex ) {     // if function has error, execution enter here.     // report error     std::cout << ex.what(); } 

but ex shows grayed if never declared. wondering how can catch exceptions in case?

it turned out file path messed up. code fine.