I think the problem is that if you register graphviz-dot as a language, it generates that require.  I got it halfway working by changing the language back to just dot; I need to go back figure out how to nonetheless use graphviz-mode for editing.

On Sun, Nov 19, 2017 at 12:57 PM, Eric S Fraga <esflists@gmail.com> wrote:
On Saturday, 18 Nov 2017 at 12:57, Charles R (Charlie) Martin wrote:
> I'm trying to use `dot` inside `org-mode` and having no luck, because when
> I evaluate

What version of org are you using?  The version I'm using has no
reference to ob-graphviz-dot.

(but the version I am using is a week or so out of date...).

--
: Eric S Fraga via Emacs 27.0.50, Org release_9.1.3-162-gde289d