Thanks Ken, though it turned out to be a stupid error on my part (not
unexpectedly!).
My custom cell view declared a property I called 'layer' which returns the
associated model object. Of course this conflicts with NSView's 'layer'
property which returns any underlying Core Animation layer, so
On May 21, 2014, at 10:10 PM, Graham Cox wrote:
> I'm using NSOutlineView with view-based rows. I've set it up to allow drag
> and drop of a row. When the drag is initiated, it throws an exception with
> the following stack trace:
>
> #00x7fff8b6d4e4a in objc_exception_throw ()
> #1
