Hi!
Presently, there is only iterations count condition. Remember that multiheuristics have very erratic convergence, they can stagnate for a long time, they can steadily make tiny steps, etc, etc.
GDEMO was introduced in the last release, it was mature enough to be used. But presently we still test it on synthetic and real life problems and accumulate experience with the solver behavior. Presently I am not ready to take the risk of promising that some convergence condition which takes something like EPSILON will find a solution with accuracy even vaguely related to EPSILON.
Promising is easy, but making that promise work is not that easy :)
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