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OBIEE 12c: ERROR: Exception in _changeState Returns While Merging Rows of Two Data Sets With Filters In Data Flow (Doc ID 2462424.1)

Last updated on APRIL 16, 2021

Applies to:

Business Intelligence Suite Enterprise Edition - Version and later
Information in this document applies to any platform.


- Data Visualization (Data Flow)

Trying to select the option for merging the rows of 2 data sets in the Data Flow.
However, when merging to rows of 2 data sets which has a filter for each flow, the error POPs up and can not proceed to set the select option of merging rows.

Bellowing is the reproduce steps:

  1. Go to Data and Create Data Flow.
  2. Add 2 Data Sets both from e.g same datasource.
  3. Add filter for both Data sets
  4. Add merge Rows for 2 data sets.
  5. Error pop-up

    ERROR: Exception in _changeState: Call to class specific state change method
    failed for component: 'DataPrepStepEditor' when switching to state

  6. Click OK for the above pop-up error.
    You will find that the select option of merging is not displayed and then you can not proceed to set the option for merging.

  7. Select Option should be Displayed to be selected as below:


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