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The operator class 'concurrency:parallel_decision_tree' is unknown

User: "srvarey"
New Altair Community Member
Updated by Jocelyn

I am trying to create a java client which uses a simple decision tree

I have search for hours but found no explanation of the following error

 

INFO: <em class="error">The operator class 'concurrency:parallel_decision_tree' is unknown. Possibly you must install a plugin for operators of group 'concurrency'.</em>
Dec 16, 2017 12:31:54 PM com.rapidminer.io.process.XMLImporter parseOperator

 

.....

 

INFO: Process //Local Repository/processes/hsr starts
Exception in thread "main" com.rapidminer.operator.UserError: The dummy operator Decision Tree (replacing concurrency:parallel_decision_tree) cannot be executed.

 

Its also not clear to me whether to use the lib files from rm studio or rm server. Tried both but still fails.

Can't find any documentation about writing java clients. Is there any? If not do you offer a consultant/developer to do say a 2 day on client site training?

Thanks

Stephen

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    User: "sgenzer"
    Altair Employee
    Accepted Answer

    moving to developer forum.

     

    Scott

     

     

    User: "srvarey"
    New Altair Community Member
    OP
    Accepted Answer

    This solved the problem....

    Plugin.addAdditionalExtensionDir("C:/Program Files/RapidMiner/RapidMiner Studio/lib/plugins");
    Plugin.setInitPlugins(true);

     

    I have posted anothe question "end to end java program"

    I don't know if you can help

    I would like a complete simple end to end java console program , where I can build the table in memory, apply a model and get the results - all in java. I know it must be possible as I have been browsing the source code. I just can't find any examples.

    If you can provide something that would be so helpful