QMessageBox memory problem

[Jeffb]

Hi guys

Have been using this code with no problem up until now.
Now its suddenly started crashing when it gets to aMB.exec();
with memory bad access.
Signal name :
EXC_BAD_ACCESS

Has anyone got any ideas what might be happening.
I have cleaned and rebuilt and even turned the machine off and back on again.
Am using Mac OS X Lion.

Thanks.
Jeff

void JB_Utilities::debugMB(const QString &text,
                           QWidget* parent,
                           Qt::WindowModality aWindowModality)
{
    cout << "ERROR: " << qPrintable(text) << endl;
    QMessageBox aMB(QMessageBox::Warning,
                    "ERROR",
                    text,
                    QMessageBox::Ok,
                    parent);
    aMB.setWindowModality(aWindowModality);
    aMB.setDefaultButton(QMessageBox::Ok);
    aMB.exec();
}

void JB_Utilities::debugMB(const QString &text,
                           QWidget* parent,
                           Qt::WindowModality aWindowModality)
{
    cout << "ERROR: " << qPrintable(text) << endl;
    QMessageBox aMB(QMessageBox::Warning,
                    "ERROR",
                    text,
                    QMessageBox::Ok,
                    parent);
    aMB.setWindowModality(aWindowModality);
    aMB.setDefaultButton(QMessageBox::Ok);
    aMB.exec();
}

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