Waiting for RPC reply to 'destroyWidget' timed out

I recieve this message when quitting my program (if the program has worked for less then 20 sec - no message):

Code:

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Waiting for RPC reply to 'destroyWidget'' call timed out
Write error:  "Unknown error" 
Sending RPC id failed for call of 'setSymbianSoftKeys'

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If I try to debug my program, then debugger stops working at a moment, when I play with items on layout:

Code:

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void MainWindow::closeTaskMain()
{
    calendar->hoursList = dataManager->hoursList;
    taskMain->setParent(0);
    layout->addWidget(calendar);
}

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What can this problem be related to?

Don't want to create new Thread, so I'll ask here:
Can u write something like this:

Code:

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QDate *dateForList = new QDate(date);

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Where date is a simple QDate?

Still no answers about the main question in this thread?