# App is not working.(after version change NaN)

**URL:** <https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332>\
**Category:** Questions about Thunkable X\
**Tags:** beginner\
**Created:** [October 23, 2019, 3:09am UTC](https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332 "2019-10-23T03:09:32Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![james.p](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/james.p/32/48255_2.png) [@james.p](https://community.thunkable.com/u/james.p)\
**Post date:** [October 23, 2019, 3:09am UTC](https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332/1 "2019-10-23T03:09:32Z")

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Hi, I’m beginner, thunkable x.  
I have some trouble in my thunkablex project.  
Yesterday i downloaded my project for test in aos.  
But its not downloaded. And shown that version notice error and auto changed my project version NaN.  
So i changed version 1 and downloaded my project(apk).  
But its not working(Force quit).So i do test in tunkable live, it work. What’s the problem my project?  
Please help me.T.T

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**Author:** ![kartik14](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/kartik14/32/44782_2.png) [@kartik14](https://community.thunkable.com/u/kartik14)\
**Post date:** [October 23, 2019, 5:10am UTC](https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332/2 "2019-10-23T05:10:51Z")

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Hi, @james.p 👋  
**Welcome to our Community 🎉 🎉**

Everytime you compile your project, check these -

 ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/6/5/65b81bd0bd69d082a8ff47dd366948d3a8356ed1.png)  
In my case, they’re _Version 2.0_. Yours might be _Version 1.0_.

> [@james.p](#):
>
> auto changed my project version NaN.

This bug only occurs when you have duplicated your project.  
So, always check your project version in Settings of your app.

Thanks 😊

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**Author:** ![james.p](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/james.p/32/48255_2.png) [@james.p](https://community.thunkable.com/u/james.p)\
**Post date:** [October 24, 2019, 1:01am UTC](https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332/3 "2019-10-24T01:01:24Z")

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Thank you reply, @kartik14  
Is this bug fixed not yet?  
I have been build My project after changed version.  
But it’s not work.

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**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\
**Post date:** [November 8, 2024, 12:08pm UTC](https://community.thunkable.com/t/app-is-not-working-after-version-change-nan/284332/4 "2024-11-08T12:08:34Z")

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