Error executing background job 'creating display' when using Visualize Model by SOM operator

Nick6

When connecting the visualisation output from the Visualize Model by SOM operator I receive the following error; 

Error executing background job 'Creating Display':
Java.lang.NullPointerException

rfuentealba

Hello @Nick6,

Can you post the XML for your process please? Here are instructions on how to do so:

https://community.rapidminer.com/discussion/37047/how-can-i-share-rapidminer-studio-processes-online-or-with-other-people

All the best,

Rodrigo.

Nick6

Hi @rfuentealba

Thanks for getting back to me. XML code follows; 

<?xml version="1.0" encoding="UTF-8"?><process version="9.5.000-BETA4">

  <context>

    <input/>

    <output/>

    <macros/>

  </context>

  <operator activated="true" class="process" compatibility="9.5.000-BETA4" expanded="true" name="Process">

    <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="9.5.000-BETA4" expanded="true" height="68" name="Retrieve COPD_All Regions" width="90" x="45" y="34">

        <parameter key="repository_entry" value="//Local Repository/data/COPD_All Regions"/>

      </operator>

      <operator activated="true" class="select_attributes" compatibility="9.5.000-BETA4" expanded="true" height="82" name="Select Attributes" width="90" x="179" y="34">

        <parameter key="attribute_filter_type" value="subset"/>

        <parameter key="attribute" value=""/>

        <parameter key="attributes" value="Age of death|Agriculture Workers [000]|Air Pollution Index|Construction Workers [000]|COPD Prevalence Percentage|Median household disposable income, pounds per week|Mining Workers [000]|Number of COPD deaths|Smoking Prevalence Percentage"/>

        <parameter key="use_except_expression" value="false"/>

        <parameter key="value_type" value="attribute_value"/>

        <parameter key="use_value_type_exception" value="false"/>

        <parameter key="except_value_type" value="time"/>

        <parameter key="block_type" value="attribute_block"/>

        <parameter key="use_block_type_exception" value="false"/>

        <parameter key="except_block_type" value="value_matrix_row_start"/>

        <parameter key="invert_selection" value="false"/>

        <parameter key="include_special_attributes" value="false"/>

      </operator>

      <operator activated="true" class="normalize" compatibility="9.5.000-BETA4" expanded="true" height="103" name="Normalize" width="90" x="313" y="34">

        <parameter key="return_preprocessing_model" value="false"/>

        <parameter key="create_view" value="false"/>

        <parameter key="attribute_filter_type" value="all"/>

        <parameter key="attribute" value=""/>

        <parameter key="attributes" value=""/>

        <parameter key="use_except_expression" value="false"/>

        <parameter key="value_type" value="numeric"/>

        <parameter key="use_value_type_exception" value="false"/>

        <parameter key="except_value_type" value="real"/>

        <parameter key="block_type" value="value_series"/>

        <parameter key="use_block_type_exception" value="false"/>

        <parameter key="except_block_type" value="value_series_end"/>

        <parameter key="invert_selection" value="false"/>

        <parameter key="include_special_attributes" value="false"/>

        <parameter key="method" value="Z-transformation"/>

        <parameter key="min" value="0.0"/>

        <parameter key="max" value="1.0"/>

        <parameter key="allow_negative_values" value="false"/>

      </operator>

      <operator activated="true" class="self_organizing_map" compatibility="9.5.000-BETA4" expanded="true" height="103" name="SOM" width="90" x="447" y="34">

        <parameter key="return_preprocessing_model" value="false"/>

        <parameter key="number_of_dimensions" value="2"/>

        <parameter key="net_size" value="10"/>

        <parameter key="training_rounds" value="30"/>

        <parameter key="learning_rate_start" value="0.8"/>

        <parameter key="learning_rate_end" value="0.01"/>

        <parameter key="adaption_radius_start" value="10.0"/>

        <parameter key="adaption_radius_end" value="1.0"/>

      </operator>

      <operator activated="true" class="visualize_model_by_som" compatibility="9.5.000-BETA4" expanded="true" height="103" name="Visualize Model by SOM" width="90" x="581" y="34"/>

      <connect from_op="Retrieve COPD_All Regions" from_port="output" to_op="Select Attributes" to_port="example set input"/>

      <connect from_op="Select Attributes" from_port="example set output" to_op="Normalize" to_port="example set input"/>

      <connect from_op="Normalize" from_port="example set output" to_op="SOM" to_port="example set input"/>

      <connect from_op="SOM" from_port="example set output" to_op="Visualize Model by SOM" to_port="example set"/>

      <connect from_op="SOM" from_port="preprocessing model" to_op="Visualize Model by SOM" to_port="model"/>

      <connect from_op="Visualize Model by SOM" from_port="example set" to_port="result 1"/>

      <connect from_op="Visualize Model by SOM" from_port="model" to_port="result 2"/>

      <connect from_op="Visualize Model by SOM" from_port="visualization" to_port="result 3"/>

      <portSpacing port="source_input 1" spacing="0"/>

      <portSpacing port="sink_result 1" spacing="0"/>

      <portSpacing port="sink_result 2" spacing="0"/>

      <portSpacing port="sink_result 3" spacing="0"/>

      <portSpacing port="sink_result 4" spacing="0"/>

    </process>

  </operator>

</process>

Nick6

Even when simplifying the process (removing attribute selection and normalization) I recieve the same error. The updated XML: 

<?xml version="1.0" encoding="UTF-8"?><process version="9.4.001">

  <context>

    <input/>

    <output/>

    <macros/>

  </context>

  <operator activated="true" class="process" compatibility="9.4.001" expanded="true" name="Process">

    <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 COPD_Dataset_R3" width="90" x="313" y="34">

        <parameter key="repository_entry" value="//Local Repository/data/COPD_Dataset_R3"/>

      </operator>

      <operator activated="true" class="self_organizing_map" compatibility="9.4.001" expanded="true" height="103" name="SOM" width="90" x="447" y="34">

        <parameter key="return_preprocessing_model" value="false"/>

        <parameter key="number_of_dimensions" value="2"/>

        <parameter key="net_size" value="10"/>

        <parameter key="training_rounds" value="30"/>

        <parameter key="learning_rate_start" value="0.8"/>

        <parameter key="learning_rate_end" value="0.01"/>

        <parameter key="adaption_radius_start" value="10.0"/>

        <parameter key="adaption_radius_end" value="1.0"/>

      </operator>

      <operator activated="true" class="visualize_model_by_som" compatibility="9.4.001" expanded="true" height="103" name="Visualize Model by SOM" width="90" x="581" y="34"/>

      <connect from_op="Retrieve COPD_Dataset_R3" from_port="output" to_op="SOM" to_port="example set input"/>

      <connect from_op="SOM" from_port="example set output" to_op="Visualize Model by SOM" to_port="example set"/>

      <connect from_op="SOM" from_port="preprocessing model" to_op="Visualize Model by SOM" to_port="model"/>

      <connect from_op="Visualize Model by SOM" from_port="example set" to_port="result 1"/>

      <connect from_op="Visualize Model by SOM" from_port="model" to_port="result 2"/>

      <connect from_op="Visualize Model by SOM" from_port="visualization" to_port="result 3"/>

      <portSpacing port="source_input 1" spacing="0"/>

      <portSpacing port="sink_result 1" spacing="0"/>

      <portSpacing port="sink_result 2" spacing="0"/>

      <portSpacing port="sink_result 3" spacing="0"/>

      <portSpacing port="sink_result 4" spacing="0"/>

    </process>

  </operator>

</process>

sgenzer

hi @Nick6 I have your process but I need your COPD_Dataset_R3 ExampleSet to run it. Can you pls share here or via PM?

Nick6

Hi @sgenzer

Thanks for looking into this. I've attached the dataset, let me know if you need anything else. 

sgenzer

thanks @Nick6. That's a bug, plain and simple. Pushing it to engineering.

Scott

Nick6

Thanks @sgenzer - using the output to feed into my masters dissertation so fingers crossed it can be resolved soon!