Problem connecting to SQL database

[AlanGifford]

I have some bigger problems that need to be addressed, but right now I am simply trying to get some error details to help me sort those bigger problems out.

What is wrong with the following?
[code]
strMsg.append(qry.lastError().text());
[/code]

Or this:
[code]
strMsg.append(db.lastError().text());
[/code]

qry is a QSqlQuery object and db is a QSqlDatabase object. My program crashes when it gets to either of these lines (in different parts of the code). I do not have a problem calling other member functions of these objects. Surely I am missing something really simple here...?

Thanks in advance!

[_compiler]

@
if(!qry.exec())
{
qDebug() << qry.lastError();
QString str = qry.lastError().text();
}
@

[AlanGifford]

Thanks for the reply! I would really like to know why what I did will not work. I am trying to learn how to avoid having situations like this happen again (with other objects/functions).