If this is in your discovered parameter file:

state = ec.gep.GEPSimpleStatistics

... then throw that parameter file away and burn it.

What you want, probably, is

stat = ec.gep.GEPSimpleStatistics

For direct responses on the GEP extension, I suggest contacting Bob
Orchard if he doesn't respond on this list.

Sean

Alejandro Rodríguez González wrote:
> Hello,
>
> I'm trying to execute some examples of GEP extension for EJC developed
> by Bob Orchard but i'm having some problems.
>
> After search some parameter files like "gep.params" and "ec.params" and
> found it on koders.com <http://koders.com>, i modify the test1.param
> example of GEP examples in order to make the example works.
>
> The problem now is that ECJ can't find the class "GEPSimpleStatistics",
> that, in the test1.param file is mentioned to be used by ECJ:
>
> state = ec.gep.GEPSimpleStatistics
>
> The output that i obtain is the next:
>
> ________________
>
> C:\Descargas\ecj\ecj>java -classpath ./;./start/javacsv.jar ec.Evolve
> -file c:\D
> escargas\ecj18Gep\ecj18MultipleChromosomes\ec\app\gep\test1\test1.params
> | ECJ | An evolutionary computation system (version 18) | By Sean Luke |
> Contributors: L. Panait, G. Balan, S. Paus, Z. Skolicki, R. Kicinger, E.
> Popov ici, | J. Harrison, J. Bassett, R. Hubley, A. Desai, and A.
> Chircop | URL: http://cs.gmu.edu/~eclab/projects/ecj/ | Mail:
> [log in to unmask] <mailto:[log in to unmask]> | (better: join
> ECJ-INTEREST at URL above) | Date: June 23, 2008 | Current Java:
> 1.6.0_13 / Java HotSpot(TM) Client VM-11.3-b02 | Required Minimum Java:
> 1.3 Exception in thread "main" ec.util.ParamClassLoadException: Class
> not found: ec.gep.GEPSimpleStatistics PARAMETER: state EXCEPTION:
> java.lang.ClassNotFoundException: ec.gep.GEPSimpleStatistics at
> ec.util.ParameterDatabase.getInstanceForParameter(ParameterDatabase.j
> ava:451) at ec.Evolve.initialize(Evolve.java:362) at
> ec.Evolve.main(Evolve.java:627)
>
> ________________
>
> I was searching this classes, and i found that exists in EJC (
> http://www.koders.com/noncode/fid450A0F990F704BEDED764BB1A30573181C3349C9.aspx?s=Pdef#L55 ),
> but in the package that i download from original EJC page, this classes
> are not included, and i don't know where download they.
>
> Can anyone help me with that?
>
> Thanks.