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Hello, I am new to ECJ and i am trying to use GA's to solve a 3D puzzle. I have written code to output the puzzle genome into a file which can be read by a opengl program written in c. I have debugged my fitness function and my openGL program and am fairly certain they should be working correctly. When i run the program i was hoping to see the puzzle correctly solved but when looked at the visualisation it is not. I think i have narrowed it down to ECJ constantly overwriting the data in the text file when it creates individuals. To get round this i have created a variable of type BitVectorIndividual and overwrite it if the new individuals fitness is better. Then i will be able to just output that individuals data to the file so i can see a correct solution. When i compare individuals it seems to not work a lot of the time and overwrite the best individual even if it is worse. Does ECJ have some sort of built in way to access the best individuals Genome or can you point me in the right direction as to how i can retrieve it. Thanks in advance, Matt