This doesn't appear to be due to segments, but rather due to the small min/max range of the segments, which is causing an inordinate number of invalid individuals. However that should *not* be an issue, so we'll look into what the initialization issue is. Sean Begin forwarded message: > From: "Eric 'Siggy' Scott" <[log in to unmask]> > Subject: CMA-ES hangs when segments are used > Date: March 29, 2016 at 9:45:49 PM EDT > To: [log in to unmask] > Reply-To: ECJ Evolutionary Computation Toolkit <[log in to unmask]> > > Using the latest snapshot from GitHub, I find that, if I use segments in my genome, CMA-ES silently gets stuck before the first generation is evaluated. > > Attached is a MWE. > > I'm guessing that some background thread has silently crashed while the main thread was waiting for it? > > Siggy > > -- > > Ph.D student in Computer Science, George Mason University > CFO and Web Director, Journal of Mason Graduate Research > http://mason.gmu.edu/~escott8/