There is absolutely no way that ECJ assigns the same individual to multiple threads. There must be a bug in your code or testing mechanism. Sean On Apr 14, 2014, at 6:33 PM, SUBSCRIBE ECJ-INTEREST-L Anonymous <[log in to unmask]> wrote: > I have tested ecj with three and then five threads. I noticed that ecj assigns the same > individual/chromosome to all three and five threads. I couldnt find anywhere in the manual > that explains how I could change this. > > Thank you. > > Regards.