[SOLVED]Binary2MultiClassModel.startNonECOCProcess encountered

jaysonpryde

Hi,

   I am using an "SVM" operator inside a "Polynomial by Binomial" operator on the RMPs that I've created recently. The RMPs are dedicated for validation, model creation and model application of the classification model I've created. Using the rapidMiner UI, I am having no problems and the expected results are seen. However, when I created a Java implementation of this, I am receiving the exception below:

Exception in thread "main" java.lang.NullPointerException
	at com.rapidminer.operator.learner.meta.Binary2MultiClassModel.startNonECOCProcess(Binary2MultiClassModel.java:164)
	at com.rapidminer.operator.learner.meta.Binary2MultiClassModel.performPrediction(Binary2MultiClassModel.java:273)
	at com.rapidminer.operator.learner.PredictionModel.apply(PredictionModel.java:76)
	at com.rapidminer.operator.ModelApplier.doWork(ModelApplier.java:100)
	at com.rapidminer.operator.Operator.execute(Operator.java:833)
	at com.rapidminer.operator.execution.SimpleUnitExecutor.execute(SimpleUnitExecutor.java:51)
	at com.rapidminer.operator.ExecutionUnit.execute(ExecutionUnit.java:709)
	at com.rapidminer.operator.OperatorChain.doWork(OperatorChain.java:379)
	at com.rapidminer.operator.Operator.execute(Operator.java:833)
	at com.rapidminer.Process.run(Process.java:925)
	at com.rapidminer.Process.run(Process.java:848)
	at com.rapidminer.Process.run(Process.java:807)
	at com.rapidminer.Process.run(Process.java:802)
	at com.rapidminer.Process.run(Process.java:792)
	at fringe.classifyPEh.Classifier.classifyBasedOnRMP(Classifier.java:268)
	at fringe.classifyPEh.ClassifyPE.main(ClassifyPE.java:28)

This is the snippet code:

                        Process process = new Process(new File(<rmpfile>));
                        Operator csv = process.getOperator("readCSV");
			csv.setParameter("column_separators", ",");
			csv.setParameter("csv_file", testData);
			csv.setParameter("first_row_as_names", "true");

			/* Set model file parameter for the Read Model Operator */
			Operator model = process.getOperator("readModel");
			model.setParameter("model_file", <model_file>);

			/* Run process and retrieve predicted labels and confidences */
			IOContainer cont = process.run();

From the stacktrace, it's quite obvious that this is related to Polynomial by Binomial Classification operator. My question is what caused it? Did i forget something in the snippet code? As mentioned, it's working fine using the rapidminer UI.


Your ideas are greatly appreciated. Thanks!

jaysonpryde

Fixed...

I am not using the latest version of rapidminer.jar.
I forgot that it was updated to 5.2

thanks!