I've run tutorial 4 with a run configuration of, -file ec/app/tutorial4/tutorial4.params -p stat.gather-full=true on Eclipse. The out.stat file has no final stats, Generation: 0 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=0.31332272 Adjusted=0.76142746 Hits=4 Tree 0: (+ (+ (* x y) y) (* (* x y) (* x x))) Generation: 1 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=0.36333463 Adjusted=0.7334956 Hits=3 Tree 0: (+ (+ (* x y) y) (* (- (* (+ y y) (+ y x)) (- (* y x) (- y x))) (* x x))) Generation: 2 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=0.14358631 Adjusted=0.8744421 Hits=6 Tree 0: (+ y (+ (* (- y y) (- y x)) (* x y))) Generation: 3 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=1.6653345E-16 Adjusted=1.0 Hits=10 Tree 0: (+ (+ (* x y) y) (* (- (+ x y) x) (* x x))) Generation: 4 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=2.220446E-16 Adjusted=1.0 Hits=10 Tree 0: (+ (+ (* x y) y) (* (- (+ x y) x) (* x x))) Generation: 5 Best Individual: Subpopulation 0: Evaluated: true Fitness: Standardized=0.0 Adjusted=1.0 Hits=10 Tree 0: (+ y (+ (* (- y y) (* x x)) (- (* x (+ (* x y) y)) (- x x)))) Best Individual of Run: Subpopulation 0: Evaluated: true Fitness: Standardized=1.6653345E-16 Adjusted=1.0 Hits=10 Tree 0: (+ (+ (* x y) y) (* (- (+ x y) x) (* x x))) The console didn't show any early termination. Threads: breed/1 eval/1 Seed: 1010753167 Job: 0 Setting up Processing GP Types Processing GP Node Constraints Processing GP Function Sets Processing GP Tree Constraints Initializing Generation 0 Subpop 0 best fitness of generation Fitness: Standardized=0.31332272 Adjusted=0.76142746 Hits=4 Generation 1 Subpop 0 best fitness of generation Fitness: Standardized=0.36333463 Adjusted=0.7334956 Hits=3 Generation 2 Subpop 0 best fitness of generation Fitness: Standardized=0.14358631 Adjusted=0.8744421 Hits=6 Generation 3 Subpop 0 best fitness of generation Fitness: Standardized=1.6653345E-16 Adjusted=1.0 Hits=10 Generation 4 Subpop 0 best fitness of generation Fitness: Standardized=2.220446E-16 Adjusted=1.0 Hits=10 Generation 5 Subpop 0 best fitness of generation Fitness: Standardized=0.0 Adjusted=1.0 Hits=10 Found Ideal Individual Subpop 0 best fitness of run: Fitness: Standardized=1.6653345E-16 Adjusted=1.0 Hits=10 Any idea why I'm not getting full stats? -- ray