The new readGenotype prints "Original size: 1 and read-size is 512". My species are the same, I only have one subpopulation. Everything is pretty simple. No rush, I totally understand about GECCO's deadline. A little quote from my parameter file: pop = ec.Population pop.subpops = 1 pop.subpop.0 = ec.Subpopulation pop.subpop.0.species = ec.gp.GPSpecies pop.subpop.0.species.ind = ec.gp.GPIndividual pop.subpop.0.species.ind.numtrees = 1 pop.subpop.0.species.ind.tree.0 = ec.gp.GPTree pop.subpop.0.species.ind.tree.0.tc = tc0 //Brad On Jan 24, 2008, at 11:39 PM, Sean Luke wrote: > Interesting... the same parameter file you say? That'd be odd. As > it turns out, there are *two* reasons for this error. Either the > number of trees being read from the file differs from the number of > trees in the original individual, *or* the tree array in the > original individual is null. This second case is unlikely but you > can test it by changing readGenotype in GPIndividual.java to be > something like: > > /** Overridden for the GPIndividual genotype. */ > public void readGenotype(final EvolutionState state, > final DataInput dataInput) throws > IOException > { > int treelength = dataInput.readInt(); > if (trees == null) > state.output.fatal("Hmmm... trees are null in readGenotype > (EvolutionState, DataInput)."); > if (treelength != trees.length) // wrong size! > state.output.fatal("Number of trees differ in > GPIndividual when reading from readGenotype(EvolutionState, > DataInput).\n" + > "Original size: " + trees.length + " and read-size is " + > treelength); > for(int x=0;x<trees.length;x++) > trees[x].readTree(state,dataInput); > } > > This would also tell us how many trees you have coming in and > currently in the individual. > > Some other oddities. Though you're setting > gp.individual.numtrees=1, this only gets checked (and used) if you > don't have the local parameter set, namely pop.subpop. > 0.species.ind.numtrees=1 What do you have set in the local > parameter? Also, how many subpopulations do you have? Do they > have different species? I'm grasping at straws here but won't be > able to really look at it until after the GECCO deadline. > > Sean > > On Jan 24, 2008, at 10:28 PM, Bradford Barr wrote: > >> Hey List, >> >> I'm having an issue with an Island model. I keep getting this error: >> >> FATAL ERROR: >> Number of trees differ in GPIndividual when reading from >> readGenotype(EvolutionState, DataInput). >> >> But both Islands (I'm only using two so I can figure out what's >> going on) are using the same parameter file, and I have a command >> line parameter saying gp.individual.numtrees=1 for both runs just >> to double check. >> >> I'm stumped. Can anyone offer any insight? >> >> Thanks in advance, >> Brad Barr