RunScheduledTask is being phased out in favor of TaskExecute, which was introduced experimentally in Version 11.2.


schedules and starts a local scheduled task that will repeatedly evaluate expr once per second.


schedules and starts a task that will repeatedly evaluate expr every time seconds.


schedules and starts a task that will evaluate expr once after time seconds.


schedules and starts a task that will try evaluating expr once every time seconds up to count times.


schedules a task that will automatically start at start time.


asynchronously executes an existing cloud task or document generator.

Details and Options

  • For local tasks, RunScheduledTask returns a ScheduledTaskObject expression representing the started task. For cloud tasks and document generators, RunScheduledTask returns the task's CloudObject.
  • RunScheduledTask creates a task to be run locally in the current Wolfram Language session. No task state is preserved between sessions.
  • RunScheduledTask[x] is effectively equivalent to StartScheduledTask[CreateScheduledTask[x]].
  • The start is taken to be the absolute time when the task is activated.
  • The first evaluation of expr will occur time seconds after it is activated.
  • If two tasks are scheduled to evaluate at the same time, the one added later will execute first.
  • By default, if the time necessary to evaluate expr is larger than time, the next pending evaluation is skipped.


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Basic Examples  (11)

The timer fires off at the end of the specified three-second interval:

Perform an action the specified number of times:

Create a task that will be activated 5 seconds from the current time and will print 1 second later:

Specify a date to activate the task:

Front end versus kernel clocks:

Create a task with random wait periods:

Create a task that restarts evaluation as soon as it finishes:

Create a task that runs only once and removes itself after finishing:

Create a task that removes itself once a condition is met:

Create a task that removes itself when an external variable is changed:

Cause the task to be stopped and removed:

Control evaluation in the scheduled task by changing an external variable:

Pause the evaluation without stopping the task:

Re-enable the evaluation:

Scope  (2)

RunScheduledTask causes cloud scheduled tasks to evaluate asynchronously, as for calendar-triggered evaluations:

Trigger the task to run asynchronously:

Delete the task:

RunScheduledTask causes document generators to evaluate asynchronously. Logging, distribution, and archiving occur as for calendar-triggered evaluations:

Trigger the generator to run asynchronously:

Delete the generator:

Options  (1)

GeneratedDocumentBinding  (1)

Use the GeneratedDocumentBinding option to override a document generator's configured driver. Deploy a document generator:

Trigger the generator to run asynchronously, overriding the driver:

Delete the generator:

Possible Issues  (1)

RunScheduledTask has attribute HoldFirst and will interpret cloud object arguments as expressions to be evaluated in a local scheduled task:

This will evaluate obj once per second in a local scheduled task:

Delete the local task:

A With or Apply construct ensures cloud execution:

Delete the cloud task:

Introduced in 2010
Updated in 2014