qt4 - xp - model/view

[incapacitant]

I have a model called "model" attached to a TreView called "treeView.
In QT4 there was a way to empty all rows.

None of the code below gives result :

qRecap->removeRows(0, qRecap->rowCount(QModelIndex()), QModelIndex());
    qRecap->clear();

qRecap->removeRows(0, qRecap->rowCount(QModelIndex()), QModelIndex());
    qRecap->clear();

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qRecap is the model.
qRecap has no member removeRows or clear.

How can i remove all entries from the model ?