QMetaMethod::invoke: Unable to handle unregistered datatype 'quintptr'

[HenryGer]

I am calling the following code.
qRegisterMetaType<quintptr>();
qDebug() << QMetaObject::invokeMethod(&m_remoteSyncWorker, "getItem", Q_ARG(quintptr, 1));r'

And I am getting the error
QMetaMethod::invoke: Unable to handle unregistered datatype 'quintptr'
false

quintptr was declared with Q_DECLARE_METATYPE(quintptr)

Such scheme works with defined by me data types like
QMetaObject::invokeMethod(&m_remoteSyncWorker, "addItem", Q_ARG(ItemData, data)); // it works fine

Why it may be happening?

[HenryGer]

I got the solution. Enjoy and thumb up
https://stackoverflow.com/questions/14712583/using-uint16-t-and-char-with-qmetaobjectinvokemethod