The Resubmit Workflow feature allows Workflow Designers, Participants and Business owners to resubmit a workflow. Workflows with the status of Failed or Completed can be resubmitted.
This feature is useful for resubmitting workflows for when a connection was unavailable or there was an issue with the workflow design that has since been resolved. Workflow designers can use it as a testing tool if desired.
Please see the Nintex Help files for more information: