Is there a way with Visual Cron to send an email alert to the administrators if a task or job can not start because a previously running task/job has not completed? For example, if there is a job that runs every 1/2 hour, but it is taking :35 minutes to complete, the job can't start on time (i.e., 9:30am job can't start because 9:00am job is still running).
thanks