TreeviewC9 fails in the tree.bas file line 70

The TreeviewC9 example fails in the Tree.bas file line 70 - (If maxright > treeview.Panel.Width Then treeview.Panel.Width = maxright) - Java.lang.NullPointerException! Attempt to read from field"int android.view.ViewGroup$LayoutParams.width" on a null object reference.

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