A similar fix corrects the problem in SPEA2Breeder.java.  Thanks for your help!

On Mon, Dec 21, 2015 at 4:29 PM, BARI, ATM GOLAM <[log in to unmask]> wrote:
Please see the following post. I think it will help.
Looks like this package is experiencing bitrot from other changes to ECJ.  In NSGA2Breeder.setup(), change the line

	for (int i = 0; i < state.population.subpops.length; i++)
	for (int i = 0; i < reduceBy.length; i++) 

However it looks like the package is missing some default settings and also I don't like the look of the F2 problem.  You can get the package working with the above, but it will take a few days for me to properly go through it and clean it out.


On Sep 17, 2015, at 2:47 PM, Renzo Massobrio <[log in to unmask]> wrote:

> Hello everyone,
> I am having a trouble with some really basic thing. On a fresh ECJ install I want to run the moosuite example with the following command:
> java ec.Evolve -file moosuite.params
> And I am encountering the following error message:
> Threads:  breed/1 eval/1
> Seed: -593881504 
> Job: 0
> Setting up
> Exception in thread "main" java.lang.NullPointerException
>        at ec.multiobjective.nsga2.NSGA2Breeder.setup(NSGA2Breeder.java:42)
>        at ec.EvolutionState.setup(EvolutionState.java:394)
>        at ec.simple.SimpleEvolutionState.startFresh(SimpleEvolutionState.java:49)
>        at ec.EvolutionState.run(EvolutionState.java:446)
>        at ec.Evolve.main(Evolve.java:769)
> Am i missing something? Anything with the same issue?
> Thanks in advance and have a nice day.
> Regards,
> Renzo

On Mon, Dec 21, 2015 at 3:51 PM, David Oranchak <[log in to unmask]> wrote:
On a fresh checkout of ECJ from github (as of today), I'm running the spea2 package using this command:

java -cp bin ec.Evolve -file src/ec/app/moosuite/zdt1.params

In moosuite.params, I have this:

parent.0 = spea2.params
#parent.0 = nsga2.params

Here is the null pointer exception that happens:

Exception in thread "main" java.lang.NullPointerException
at ec.multiobjective.spea2.SPEA2Breeder.setup(SPEA2Breeder.java:33)
at ec.EvolutionState.setup(EvolutionState.java:394)
at ec.simple.SimpleEvolutionState.startFresh(SimpleEvolutionState.java:46)
at ec.EvolutionState.run(EvolutionState.java:446)
at ec.Evolve.main(Evolve.java:771)

It doesn't seem to be setting up the population properly.

The same command works when I change moosuite.params to use nsga2 instead, like this:

#parent.0 = spea2.params
parent.0 = nsga2.params

Thanks for any help you can provide.  Meanwhile, I will continue to troubleshoot the problem.