Creating event fails on Symbian^3 device

Creating event fails on Symbian^3 device. The attached code works ok on simulator but on a device it fails to create the event.
Project showing the error attached.

void MainWindow::CreateAlert(QString Title,QString Description,QDate Date,QTime Time)
{
QOrganizerManager manager;
QOrganizerEvent event;
QOrganizerItemVisualReminder rem;
rem.setSecondsBeforeStart(15*60);

event.setStartDateTime(QDateTime(QDate(Date),QTime(Time)));

event.saveDetail(&rem);
event.setDescription(Description);

event.setDisplayLabel(QString(Title));
manager.saveItem(&event);
}