Fix without dms crash bug.
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@@ -363,7 +363,7 @@ void DialogManager::raiseDeviceError(QObject *parent, QObject *msg) {
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clearMessageDialog();
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auto dialog = new GUIMessageDialog(mTopWidget);
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if(mFunctionDialog->isRunning())
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if(mFunctionDialog!= nullptr && mFunctionDialog->isRunning())
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{
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dialog->setWindowFlags(dialog->windowFlags() | Qt::WindowStaysOnTopHint | Qt::BypassWindowManagerHint );
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}
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