On 2017-06-20 at 08:45, Markus Metz <markus.metz.gisw...@gmail.com> wrote:
> Negative values in the drainage direction should only occur at the
> borders of the current region and around NULL cells. Note that if you
> want internal sinks to be drained, you must not use the depression
> option.

I was not using depression option but I have determined that the mask I was 
using had a few NULLs in it that I was not aware of. I think this was the 
problem.

Thank you for assisting,

  -k.
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