Running a transformation in silent mode suppresses all dialog boxes that the transformation generates. The transformation applies default rules and behavior, which might generate unexpected or incorrect transformation output. You should only run a transformation in silent mode when you need to validate that the transformation runs, instead of validating the transformation output. For example, you might run a transformation in silent mode as part of an automated task or automated test suite.
By default, transformations do not run in silent mode. Clear the silent mode check boxes if the transformation does not generate the output that you expect when you run it in silent mode.