Validate Advanced Data Grid

You can do this but it will not be a validation for a specific row, it will be a validation for the whole advanced data grid.

In an Active Form Flow that is Run at Startup and triggered on Advanced Data Grid Selection Changes, you can use Get Control Value to get the values of the Advanced Data Grid. Pass the output to a For Each step so that each row can be evaluated by your rule. If your rule returns true, use Clear all Validations. If the rule returns false, use Set Validations.

• Customizing Validations: https://documentation.decisions.com/docs/customizing-validations-in-decisions
• AFF Validations: https://documentation.decisions.com/docs/active-form-flows-validations