Errors in my node

Node Development
1

Hi
I have several problems with my node:

  1. I always get the same error as: Output spec-array length invalid: 1 <> 2, I have already configured the node xml and the class constructor.
  • My node receives a table and has a table and a PortObject as output. The class builder looks like this:
    super (new PortType {BufferedDataTable.TYPE}, new PortType {BufferedDataTable.TYPE, modelPortType});
    When I run the node and save the workflow. When starting again I get a series of errors that I do not understand.
    ERROR LoadWorkflowRunnable Errors during load: Status: DataLoadError: KNIME_project 0 loaded with error during data load
    ERROR LoadWorkflowRunnable Status: DataLoadError: KNIME_project 0
    ERROR LoadWorkflowRunnable Status: DataLoadError: Adjustment FM 0: 4
    ERROR LoadWorkflowRunnable Status: DataLoadError: Unable to load port content for node "Adjustment FM": Failed to instantiate class “PortModelMath” (failed to invoke no-arg constructor): cujae.edu.cu.PortModelMath
    ERROR LoadWorkflowRunnable Status: DataLoadError: State has changed from EXECUTED to CONFIGURED

I would like to know if anyone can help me? Thanks in advance.

2

Hi,
It seems like in your configure method you are returning only one spec object, but you need to return two, as you have two outputs. Additionally, your PortObject class must have a constructor without arguments. Any data and args for the constructor must be loaded by the serializer that belongs to it.
Kind regards
Alexander

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3

Thank you. With your answer I solve all my problems.
Greetings
Taday

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