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Test a DMN model locally with the DMN Runner before publishing. These guides require Authoring access and a running Extended Services instance. The DMN Runner takes over the right side of the editor, split into two panels: Inputs on the left (one field per Input Data node) and Outputs on the right, evaluated live as you fill the inputs. DMN Runner panel with inputs and outputs

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How to test a model with sample inputs

Run a DMN model locally against sample inputs and see live outputs. Prerequisites: A .dmn/.dmns file open; Extended Services running (you are prompted to start it if not). Steps:
  1. At the right end of the model tabs row, open the run options menu (the ▾ next to the play button) and choose As Form or As Table. Run menu options
  2. In the DMN Runner panel, enter values in the generated inputs.
Verify: The output section updates automatically with evaluated results — the Outputs cards show real values instead of (null) / “Evaluation skipped”.

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How to manage test input rows

Maintain multiple input scenarios for a model. Prerequisites: DMN Runner open (see How to test a model with sample inputs). Steps:
  1. Click Add row to create a scenario.
  2. Use the Row N dropdown to switch scenarios.
  3. (Optional) Toggle Strict mode in the Run menu.
Verify: The selected row’s inputs and outputs display in the panel.

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How to save, load, or clear test inputs

Persist or reset your test data. Prerequisites: DMN Runner open. Steps:
  1. Open the run options menu.
  2. Choose Download inputs (saves a .json) or Upload inputs (pick a .json).
Verify: Inputs are downloaded, or loaded into the rows. To copy test data without a file, use the Actions menu at the top of the Inputs panel: Copy inputs as JSON and Paste inputs from JSON.