virtual 60 virtual 3 virtual 3 virtual 3 virtual 3 virtual 7 . . .
(a *lot* of these), and the resulting graph isn't layed out correctly (the nodes overlap).
Just 'dot', no arguments, triggers this. I haven't found any combination of arguments that _doesn't_ trigger it, in fact. I'm unable to find a smaller graph that does the same thing.
Sorry about the butt-uglyness of the graph -- I haven't had time to clean up the output of the program that generates it.
I'll attach the output, in case it gives you any further clues.
Having been able to reduce a previously huge graph down to a measly size (attached graph) while still seeing dot balk, I'm wanting to post a followup to the bugreport. I'm probably blind, or had too much beer at the LUG meet, but I can't seem to find that option.
Anyhoo, here she is. If you want to see what the graph _should_ look
like, remove the second and beforelast lines.
Input file: b226.dot
Output file: b226a.dot