# Launching Win app from Client - how to ensure only once

**URL:** <https://forum.inductiveautomation.com/t/launching-win-app-from-client-how-to-ensure-only-once/5585>\
**Category:** Ignition\
**Created:** [December 14, 2012, 2:51pm UTC](https://forum.inductiveautomation.com/t/launching-win-app-from-client-how-to-ensure-only-once/5585 "2012-12-14T14:51:24Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Pilotek](https://avatars.discourse-cdn.com/v4/letter/p/7ba0ec/32.png) [@Pilotek](https://forum.inductiveautomation.com/u/Pilotek)\
**Post date:** [December 14, 2012, 2:51pm UTC](https://forum.inductiveautomation.com/t/launching-win-app-from-client-how-to-ensure-only-once/5585/1 "2012-12-14T14:51:24Z")

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Please is it possible to ensure that operator can launch only one Windows app from Client Viewer - some object with system.util.execute([SomeWindowsApp])?

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**Author:** ![dave.fogle](https://avatars.discourse-cdn.com/v4/letter/d/43a26b/32.png) [@dave.fogle](https://forum.inductiveautomation.com/u/dave.fogle)\
**Post date:** [December 14, 2012, 7:07pm UTC](https://forum.inductiveautomation.com/t/launching-win-app-from-client-how-to-ensure-only-once/5585/2 "2012-12-14T19:07:28Z")

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I don't believe it is possible to restrict it to only launching one instance. I don't think there is an easy way of determining if the application that was launched is still open or not.

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**Author:** ![jose.carrola](https://avatars.discourse-cdn.com/v4/letter/j/7cd45c/32.png) [@jose.carrola](https://forum.inductiveautomation.com/u/jose.carrola)\
**Post date:** [October 5, 2020, 10:18pm UTC](https://forum.inductiveautomation.com/t/launching-win-app-from-client-how-to-ensure-only-once/5585/3 "2020-10-05T22:18:00Z")

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Is this still something that is not possible? I would like to prevent my operators from opening more than one window.