On Thu, 13 Apr 2017 10:52:44 +0200 (CEST) Michael Van Canneyt <michael at freepascal.org> wrote: >[...] > I am not sure that what you did is supported. > > b.notbits(b) > > I am not sure that you can pass the same instance to b. Just look at the code. It's only a few lines. It is supported. Mattias