# Wait For Threads

This action will wait until all background threads stop running.

Action available for the following operating systems:

![](/files/-MAlQBZuuTnc6hyzKSVQ)

### Usage

If you are executing an action set in thread mode and you want to exit the form, it’s recommended to wait until the action set finishes before exiting the form, or you can cause the application to crash.\
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In this case you can use the "[Wait For Threads](/kalipso5/developing/form/actions/actions-description/group-code-flow/wait-for-threads.md)" to make sure no thread is running before closing the form.\
It is also valid for [Timers](/kalipso5/developing/form/option-window/timers.md) in Thread Mode. When you call "[StopTimer](/kalipso5/developing/form/actions/actions-description/group-date-time/stop-timer.md)"**,** if the timer is running when this is called, the timer is stopped, but the event continues executing.\
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You can use this action to wait for timers that haven't finished executing.


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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

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