Below is the error I get everytime I use the Simulator Block since I updated... * Exception: java.lang.NullPointerException * Message: null * Stack trace: * com.rapidminer.extension.modelsimulator.simulator.ModelSimulatorRenderer.createPredictionData(ModelSimulatorRenderer.java:280) * com.rapidminer.extension.modelsimulator.simulator.ModelSimulatorRenderer.getVisualizationComponent(ModelSimulatorRenderer.java:106) * com.rapidminer.gui.processeditor.results.ResultDisplayTools$1.run(ResultDisplayTools.java:171) * com.rapidminer.gui.tools.ProgressThread$3.run(ProgressThread.java:586) * java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) * java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) * java.lang.Thread.run(Thread.java:748) Any tips?

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Model Simulator Seems to be Broken in RM 9.4

mortiz

Below is the error I get everytime I use the Simulator Block since I updated...

Exception: java.lang.NullPointerException
Message: null
Stack trace:
com.rapidminer.extension.modelsimulator.simulator.ModelSimulatorRenderer.createPredictionData(ModelSimulatorRenderer.java:280)
com.rapidminer.extension.modelsimulator.simulator.ModelSimulatorRenderer.getVisualizationComponent(ModelSimulatorRenderer.java:106)
com.rapidminer.gui.processeditor.results.ResultDisplayTools$1.run(ResultDisplayTools.java:171)
com.rapidminer.gui.tools.ProgressThread$3.run(ProgressThread.java:586)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Any tips?

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Accepted answers

IngoRM

Another quick follow up: does your data contain Date or Time columns by any chance?

IngoRM

Awesome, thanks for confirming! I was able to reproduce the problem with a date column and we will look into this asap. Sorry again for the inconvenience.

Best,
Ingo

All comments

varunm1

Hello @mortiz

I am currently on 9.4 and the model simulator is working fine for me. Can you test the below sample process and inform us if this is working or not?

<?xml version="1.0" encoding="UTF-8"?><process version="9.4.001">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.4.000" expanded="true" name="Process" origin="GENERATED_TUTORIAL">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="retrieve" compatibility="9.4.001" expanded="true" height="68" name="Retrieve Titanic Training" origin="GENERATED_TUTORIAL" width="90" x="45" y="34">
        <parameter key="repository_entry" value="//Samples/data/Titanic Training"/>
      </operator>
      <operator activated="true" class="naive_bayes" compatibility="9.4.001" expanded="true" height="82" name="Naive Bayes" origin="GENERATED_TUTORIAL" width="90" x="179" y="34">
        <parameter key="laplace_correction" value="true"/>
      </operator>
      <operator activated="true" class="retrieve" compatibility="9.4.001" expanded="true" height="68" name="Retrieve Titanic Unlabeled" origin="GENERATED_TUTORIAL" width="90" x="179" y="136">
        <parameter key="repository_entry" value="//Samples/data/Titanic Unlabeled"/>
      </operator>
      <operator activated="true" class="model_simulator:model_simulator" compatibility="9.4.001" expanded="true" height="103" name="Model Simulator" origin="GENERATED_TUTORIAL" width="90" x="313" y="34"/>
      <connect from_op="Retrieve Titanic Training" from_port="output" to_op="Naive Bayes" to_port="training set"/>
      <connect from_op="Naive Bayes" from_port="model" to_op="Model Simulator" to_port="model"/>
      <connect from_op="Naive Bayes" from_port="exampleSet" to_op="Model Simulator" to_port="training data"/>
      <connect from_op="Retrieve Titanic Unlabeled" from_port="output" to_op="Model Simulator" to_port="test data"/>
      <connect from_op="Model Simulator" from_port="simulator output" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

mortiz

That actually works. hmm...

varunm1

Is it possible to share the process and data that is throwing you this error? It would be helpful to recreate your error to see how the inputs are going inside the simulator.

mortiz

Unfortunately I cant share the XML but this is the process...

mortiz

Everything works except that block.

varunm1

Can you set a breakpoint before the "model simulator" to see if the model, training and test sets are going inside? You can set this by right-clicking on the model simulator operator and breakpoint before. Once you set it run the process and see what is going inside.

IngoRM

Yes, please, whatever you can share will be very helpful! This has been reported a couple of days ago (see: https://community.rapidminer.com/discussion/55665/after-updating-rapidminer-i-am-getting-error-running-the-model-simulator ) but we did not got a lot of information yet what is causing this issue. I also cannot reproduce it and that makes fixing very hard...

We really appreciate your support on this and are very sorry for the inconvenience,

Ingo

IngoRM

Another quick follow up: does your data contain Date or Time columns by any chance?

mortiz

@IngoRM @varunm1

Looks like the error sits with the Date attribute. When I removed Date from my dataset, the model simulator ran correctly.

varunm1

Hello @mortiz

That's the issue. The model simulator doesn't support date attribute. Glad you resolved it

IngoRM

Awesome, thanks for confirming! I was able to reproduce the problem with a date column and we will look into this asap. Sorry again for the inconvenience.

Best,
Ingo

IngoRM

Just to keep you folks in the loop: the error has been fixed and we will deliver the fix as part of the next release (actually coming quite soon already...)

mortiz

Thanks for the update!

sgenzer

Again just for those who want to follow this issue, it is in Product Feedback here: https://community.rapidminer.com/discussion/55665/after-updating-rapidminer-i-am-getting-error-running-the-model-simulator