# ERROR with system

**URL:** <https://forum.inductiveautomation.com/t/error-with-system/15987>\
**Category:** General Discussion\
**Created:** [November 13, 2017, 11:36pm UTC](https://forum.inductiveautomation.com/t/error-with-system/15987 "2017-11-13T23:36:13Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![antoniosantos\_ccb](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@antoniosantos\_ccb](https://forum.inductiveautomation.com/u/antoniosantos_ccb)\
**Post date:** [November 13, 2017, 11:36pm UTC](https://forum.inductiveautomation.com/t/error-with-system/15987/1 "2017-11-13T23:36:13Z")

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Please, say why this error?  
Estou usando system.db.runQuery().

 ![](https://us1.discourse-cdn.com/inductiveautomation/original/2X/6/6f401ed95a50af8c6c72c63c935428f674f5026c.png)

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**Author:** ![ks0](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ks0/32/6813_2.png) [@ks0](https://forum.inductiveautomation.com/u/ks0)\
**Post date:** [November 14, 2017, 12:38am UTC](https://forum.inductiveautomation.com/t/error-with-system/15987/2 "2017-11-14T00:38:53Z")

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system isn’t being imported correctly - where is your function “loadTags” being executed from?

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**Author:** ![ks0](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ks0/32/6813_2.png) [@ks0](https://forum.inductiveautomation.com/u/ks0)\
**Post date:** [November 14, 2017, 12:40am UTC](https://forum.inductiveautomation.com/t/error-with-system/15987/3 "2017-11-14T00:40:04Z")

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Is this your problem? [Using system.\* inside a custom function?](http://forum.inductiveautomation.com/t/using-system-inside-a-custom-function/12355/9?u=chh)

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**Author:** ![antoniosantos\_ccb](https://avatars.discourse-cdn.com/v4/letter/a/e0b2c6/32.png) [@antoniosantos\_ccb](https://forum.inductiveautomation.com/u/antoniosantos_ccb)\
**Post date:** [November 14, 2017, 9:28am UTC](https://forum.inductiveautomation.com/t/error-with-system/15987/4 "2017-11-14T09:28:32Z")

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Yes. Tank you.  
But it do not works in windowOpened. Why?  
How can I execute a function on windows opening?  
My function is in root container.

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**Author:** ![albetro.15](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/albetro.15/32/3922_2.png) [@albetro.15](https://forum.inductiveautomation.com/u/albetro.15)\
**Post date:** [January 9, 2018, 10:02am UTC](https://forum.inductiveautomation.com/t/error-with-system/15987/5 "2018-01-09T10:02:14Z")

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is there a button that creates that window to open? If yes you can always use the scripting editor in that button to execute the script you want.