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"problem using SVDReduction in java code"

User: "Legacy User"
New Altair Community Member
Updated by Jocelyn
Hi,

  My question is regarding the exception stated below:

=====================================================================================
    Exception in thread "main" java.lang.NoClassDefFoundError: Jama/Matrix
at com.rapidminer.operator.features.transformation.JamaDimensionalityReduction.dimensionalityReduction(JamaDimensionalityReduction.java:59)
at com.rapidminer.operator.features.transformation.DimensionalityReducer.apply(DimensionalityReducer.java:66)
at com.rapidminer.operator.Operator.apply(Operator.java:656)
...
Caused by: java.lang.ClassNotFoundException: Jama.Matrix
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 5 more

=====================================================================================

This occurs when i integrate my program with the code below:

                                ...
Operator SVD = OperatorService.createOperator("SVDReduction");

IOContainer container = wvtoolOperator.apply(new IOContainer());
container = SVD.apply(container);                        //ERROR OCCURS HERE
ExampleSet exampleSet = container.get(ExampleSet.class);
                                ...

=======================================================================

When i replace "SOMDimensionalityReduction" with "SVDReduction" it works fine. May i know what are the possible causes?

james,
regards

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