java.lang.NoClassDefFoundError: org/encog/neural/data/NeuralData

Hi, I've been getting this error alot when using the Backpropagation training method on a FeedForwardPattern network.

I've deleted and re-dowloaded the latest version of encog and serched for bugs in my code to within an inch of its life and cannot find anything.

Here's the code that I think is going wrong... Commenting out this or using a different training methiod (such as genetic or annealing) causes the program to execute.


private void TrainNetwork() throws IOException
{

BasicNeuralDataSet set = new BasicNeuralDataSet(
this.learningInput,
this.learningIdeal
);

Backpropagation train = new Backpropagation(
network.generate(),
set,
0.5, // learning rait
0.5 // momentum
);

int epoch = 0;
int endEpoch = 5000;
do
{
train.iteration();

this.trace("Training: Epoch=" + epoch + " of "+ endEpoch +". Error=" + train.getError() + ".");

double[] point = new double[]{epoch, train.getError()};
this.parent.postCIAgentEvent(
new CIAgentEvent(this, "UPDATE_GUI_ADD_GRAPH_POINT", point));

SerializeObject.save(FILE_PATH, (Serializable) network);

epoch++;
}
while((epoch < endEpoch) && (train.getError() > 0.001));
}

and here's the StackTrace ... which shows something completely different. The constructor here is an empty one.. so I'm pretty sure it's not causing the error...

Exception in thread "Thread-7" java.lang.NoClassDefFoundError: org/encog/neural/data/NeuralData
at ravensbridge.skunkworks.neural.swing.SwingDetectorTrainer.process(SwingDetectorTrainer.java:49)
at ravensbridge.skunkworks.neural.swing.SwingDetectorTrainer.processTimerPop(SwingDetectorTrainer.java:63)
at ciagent.CIAgentTimer.run(CIAgentTimer.java:150)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassNotFoundException: org.encog.neural.data.NeuralData
at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
... 4 more
BUILD SUCCESSFUL (total time: 25 seconds)

Has anyone come across this before, or can help me out?

Chears all,
Matt