That answer is in the question.

Dave K wrote:
> After I tried the tos-check-env, it gave me this warning.

<SNIP>

> --> WARNING: tos-check-env could not find the 'dot' executable which is part 
> of
> the AT&T Graphviz package. Please install version 1.1.0 of Graphviz if you'd 
> lik
> e to use the nescdoc documentation generator. If Graphviz is already 
> installed,
> then dot may not be in your PATH.

tos-check-env is looking for the Graphviz package. It contains an
executable with a three letter name, "dot". This software is used to
generate graphical representations of your program wiring when you
generate documentation using "make [platform] docs". You should check
your distribution package manager or Cygwin installer for a Graphviz
package. If you are curious you can read about Graphviz here
http://www.graphviz.org/

You will be able compile software and program nodes without 'dot' installed.

Ereth
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