# \[error\] Unknown function :'IsAuthorized'

**URL:** <https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [January 4, 2021, 12:17am UTC](https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911 "2021-01-04T00:17:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![tamerplc](https://avatars.discourse-cdn.com/v4/letter/t/d78d45/32.png) [@tamerplc](https://forum.inductiveautomation.com/u/tamerplc)\
**Post date:** [January 4, 2021, 12:17am UTC](https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911/1 "2021-01-04T00:17:35Z")

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Hi,  
unable to add expression “IsAuthorized” and getting below error . i tested in v8.0.16 and version 8.1  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/e/0e9849bf5ccc25048a9c924dc65cb85d7724c14c.png)  
the only avaiable “hasRole”

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/8/28d9029e1c67bf9069daa350e637c0cc1eadb175.png)

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<div class="post-metadata">

**Author:** ![nader.chinichian](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nader.chinichian/32/9261_2.png) [@nader.chinichian](https://forum.inductiveautomation.com/u/nader.chinichian)\
**Post date:** [January 4, 2021, 4:23am UTC](https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911/2 "2021-01-04T04:23:22Z")

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Hi  
It is fixed in 8.1.1

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<div class="post-metadata">

**Author:** ![sbeauregard66](https://avatars.discourse-cdn.com/v4/letter/s/ecd19e/32.png) [@sbeauregard66](https://forum.inductiveautomation.com/u/sbeauregard66)\
**Post date:** [March 15, 2021, 1:22am UTC](https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911/3 "2021-03-15T01:22:11Z")

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I am running 8.1.3 and I am having exact same issue. Unknown function: ‘isAuthorized’

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**Author:** ![cmallonee](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmallonee/32/6416_2.png) [@cmallonee](https://forum.inductiveautomation.com/u/cmallonee)\
**Post date:** [March 22, 2021, 12:42am UTC](https://forum.inductiveautomation.com/t/error-unknown-function-isauthorized/41911/4 "2021-03-22T00:42:43Z")

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I’m reasonably certain that `isAuthorized` is limited to use in the Perspective context. Vision projects do not make use fo Security Levels and so have no use for `isAuthorized`.