====== Force to Fail an Expression for Testing ======

  - Add an expression task
  - set the expression to an always true one such as ''1==1''
  - In ''properties'' setting of the expression task ''mise'' section, set ''ForceExecutionResult'' to ''Failure''

Learn it from here:
https://www.thisintelligentlife.net/how-to-fail-an-ssis-task