# Mobile app platform configuration problem

**URL:** <https://forum.radsystems.io/t/mobile-app-platform-configuration-problem/679>\
**Category:** NodeRad Vue\
**Created:** [December 27, 2021, 12:20pm UTC](https://forum.radsystems.io/t/mobile-app-platform-configuration-problem/679 "2021-12-27T12:20:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rha](https://forum.radsystems.io/letter_avatar_proxy/v4/letter/r/cdc98d/32.png) [@rha](https://forum.radsystems.io/u/rha)\
**Post date:** [December 27, 2021, 12:20pm UTC](https://forum.radsystems.io/t/mobile-app-platform-configuration-problem/679/1 "2021-12-27T12:20:35Z")

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Hello  
I am using the trial version. I try to use the mobile platform app but it gives me an error:

 ![problem](https://forum.radsystems.io/uploads/default/original/1X/4944f0dd13e08a0a38626112ce4a3920e44b400a.png)  
ANDROID\_SDK\_ROOT  
It seems that I need to configure ANDROID\_SDK\_ROOT and ANDROID\_HOME, but I don’t know where to find the configuration file.  
run “javac -version” and it’s 11.0.10. Is it possible to use this version or do you have to use 8?  
I hope you can help me.  
Thanks

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**Author:** ![willvin](https://forum.radsystems.io/user_avatar/forum.radsystems.io/willvin/32/7_2.png) [@willvin](https://forum.radsystems.io/u/willvin)\
**Post date:** [December 27, 2021, 2:05pm UTC](https://forum.radsystems.io/t/mobile-app-platform-configuration-problem/679/2 "2021-12-27T14:05:16Z")

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You need to set them in your **environmental variables**.