[jgap-users] Problems with InvalidConfigurationException

[jimsbr <ji...@ho...>]

Hello -
I[m new to JGap and am trying to implement an ADF that accepts a
CommandGene.BooleanClass and returns a CommandGene.FloatClass.

The startup code is listed below -
public GPGenotype create()
      throws InvalidConfigurationException {
    GPConfiguration conf = getGPConfiguration();
    // At first, we define the return type of the GP program.
    // ------------------------------------------------------
    Class[] types = {
        // Return type of result-producing chromosome
        CommandGene.FloatClass, 
        // ADF-relevant:
        // Return type of ADF 1
        CommandGene.FloatClass};

    //
-----------------------------------------------------------------------
    Class[][] argTypes = {
        // Arguments of result-producing chromosome: none
        {},
        // ADF-relevant:
        // Arguments of ADF1
        {CommandGene.BooleanClass}
    };
    // Next, we define the set of available GP commands and terminals to
use.
    // Please see package org.jgap.gp.function and org.jgap.gp.terminal
    // You can easily add commands and terminals of your own.
    //
----------------------------------------------------------------------
    CommandGene[][] nodeSets = { {
        // We use a variable that can be set in the fitness function.
        // ----------------------------------------------------------
        new Add(conf, CommandGene.FloatClass),
        new Or(conf),
        new Terminal(conf, CommandGene.FloatClass, 2.0d, 10.0d, true),
        new True(conf),
        // ADF-relevant:
        // Construct a reference to the ADF defined in the second nodeset
        // which has index 1 (second parameter of ADF-constructor).
        // Furthermore, the ADF expects three input parameters (see
argTypes[1])
        new ADF(conf, 1 , 1)
    } ,
        // ADF-relevant:
        // and now the definition of ADF(1)
        {
        new MyIfStatement(conf, CommandGene.BooleanClass)
        }

    };

The program returns a Exception in thread "main"
org.jgap.InvalidConfigurationException: java.lang.IllegalStateException:
Chromosome (depth 0, index 1) requires a function or terminal of return type
class java.lang.Float (sub return type 0) but there is no such node
available

The error is occurring because isPossible(Class a_returnType, int
a_subReturnType,
                            CommandGene[] a_nodeSet,
                            boolean a_function, boolean a_growing) is
returning false.

The CommandGene[0] type is MyIfStatement, CommandGene[1] is Argument.
Can you give me some idea as to what I am doing wrong?

Thanks,
Jim

-- 
View this message in context: http://www.nabble.com/Problems-with-InvalidConfigurationException-tp22551835p22551835.html
Sent from the jgap-users mailing list archive at Nabble.com.