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Hi all,

My name is Eva Alfaro-Cid and I work in a research institute in Valencia 
(Spain).

Lately I have been working on the creation of bankruptcy prediction models 
using GP. I am trying to use the multiobjective SPEA2 package for my 
problem but I get an error message that says:

_______________________________________________________

Initializing Generation 0

  Truncating the archive
Exception in thread "EvolutionAgent.0789779.3185923" 
java.lang.NullPointerException
        at ec.select.TournamentSelection.produce
(TournamentSelection.java:170)
        at ec.gp.koza.CrossoverPipeline.produce(CrossoverPipeline.java:260)
        at ec.breed.MultiBreedingPipeline.produce
(MultiBreedingPipeline.java:130)
        at ec.multiobjective.spea2.SPEA2Breeder.breedPopChunk
(SPEA2Breeder.java:177)
        at ec.multiobjective.spea2.SPEA2Breeder.breedPopulation
(SPEA2Breeder.java:108)
        at ec.simple.SimpleEvolutionState.evolve
(SimpleEvolutionState.java:118)
        at ec.drm.EvolutionAgent.run(EvolutionAgent.java:484)
        at java.lang.Thread.run(Thread.java:595)
____________________________________________________________

I guess I have done something wrong while setting the parameters in 
the .params file. (See attachment)

Can anyone help me to figure out what I am doing wrong?

Best regards, Eva