# Client Event Scripting

**URL:** <https://forum.inductiveautomation.com/t/client-event-scripting/6056>\
**Category:** General Discussion\
**Created:** [March 19, 2013, 6:12pm UTC](https://forum.inductiveautomation.com/t/client-event-scripting/6056 "2013-03-19T18:12:10Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jwintegration](https://avatars.discourse-cdn.com/v4/letter/j/958977/32.png) [@jwintegration](https://forum.inductiveautomation.com/u/jwintegration)\
**Post date:** [March 19, 2013, 6:12pm UTC](https://forum.inductiveautomation.com/t/client-event-scripting/6056/1 "2013-03-19T18:12:10Z")

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Why do I get the following error when I execute a tag change event script:

NameError: name ‘newvalue’ is not defined

The event scripting is:

value = newvalue.value

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**Author:** ![James.Lorenz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/james.lorenz/32/3290_2.png) [@James.Lorenz](https://forum.inductiveautomation.com/u/James.Lorenz)\
**Post date:** [March 19, 2013, 6:34pm UTC](https://forum.inductiveautomation.com/t/client-event-scripting/6056/2 "2013-03-19T18:34:54Z")

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Variables are case sensitive - use “newValue”.

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**Author:** ![jwintegration](https://avatars.discourse-cdn.com/v4/letter/j/958977/32.png) [@jwintegration](https://forum.inductiveautomation.com/u/jwintegration)\
**Post date:** [March 19, 2013, 10:36pm UTC](https://forum.inductiveautomation.com/t/client-event-scripting/6056/3 "2013-03-19T22:36:31Z")

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Thanks James, devils in the detail. That works now.