# How to update old app from FuseOpen 1.10 to Fuse X last beta
**URL:** https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102
**Category:** How-to Discussions
**Created:** [January 19, 2021, 11:29am UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102 "2021-01-19T11:29:20Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Nereo](https://forums.fusetools.com/u/Nereo)
#### Post date: [January 19, 2021, 11:29am UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102/1 "2021-01-19T11:29:20Z")
hello,
on 2019 I have developed an app with Fuse Open 1.10, now I would like to continue working on it and I could not find any way to update it with Fuxe X.
I installed Fuse X and SDK in a new pc, but I don’t know how to update my app with it.
I was wondering if there is any documentation about it, any help will be immensely appreciate, I am stuck at the moment.
Thank you
---
### Author:  [@mortend](https://forums.fusetools.com/u/mortend)
#### Post date: [January 19, 2021, 2:18pm UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102/2 "2021-01-19T14:18:54Z")
Hi Nereo,
In most cases the upgrade is expected to go pretty smoothly. You open your app in Fuse X and usually it just works without any modifications required.
Is there anything in particular you are stuck with? Do you get any error messages?
Thanks for testing!
---
### Author:  [@Nereo](https://forums.fusetools.com/u/Nereo)
#### Post date: [January 19, 2021, 2:50pm UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102/3 "2021-01-19T14:50:57Z")
Hello mortend and thank you for your answer.
When I run fuse preview from the terminal I get the error:
is referenced but stripped from export (internal error)
```
fuse X version 2.0.0-beta.8
Starting preview for mypath/myproj.unoproj, target dotnet
Configuring 3.16 s
Compiling syntax tree 1.78 s
Generating assemblies
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\Uno.Net.Http\2.0.0-beta.9\Uri.uno(206): I0000: 'Uno.Array_.Copy(byte[],byte[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\Uno.Net.Http\2.0.0-beta.9\Uri.uno(206,1): Error I0000: 'Uno.Array_.Copy(byte[],byte[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\UnoCore\2.0.0-beta.9\Source\Uno\Array.uno(16): I0000: 'Uno.Array_.Copy(T[],int,T[],int,int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\UnoCore\2.0.0-beta.9\Source\Uno\Array.uno(16,1): Error I0000: 'Uno.Array_.Copy(T[],int,T[],int,int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\UnoCore\2.0.0-beta.9\Source\Uno\Array.uno(52): I0000: 'Uno.Array_.Sort(T[],int,int,Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\uno\lib\build\UnoCore\2.0.0-beta.9\Source\Uno\Array.uno(52,1): Error I0000: 'Uno.Array_.Sort(T[],int,int,Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Common\2.0.0-beta.5\Json.uno(40): I0000: 'Uno.Array_.Copy(string[],string[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Common\2.0.0-beta.5\Json.uno(40,1): Error I0000: 'Uno.Array_.Copy(string[],string[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Common\2.0.0-beta.5\Json.uno(41): I0000: 'Uno.Array_.Sort(string[],Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Common\2.0.0-beta.5\Json.uno(41,1): Error I0000: 'Uno.Array_.Sort(string[],Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Nodes\2.0.0-beta.5\Visual.ZOrder.uno(116): I0000: 'Uno.Array_.Sort(Fuse.Visual[],Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\node_modules\@fuse-open\fuselibs\Source\build\Fuse.Nodes\2.0.0-beta.5\Visual.ZOrder.uno(116,1): Error I0000: 'Uno.Array_.Sort(Fuse.Visual[],Uno.Comparison)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\src\simulator\build\Outracks.Simulator\2.0.0-beta.8\Runtime\ArrayStream.cs(121): I0000: 'Uno.Array_.Copy(byte[],byte[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\src\simulator\build\Outracks.Simulator\2.0.0-beta.8\Runtime\ArrayStream.cs(121,1): Error I0000: 'Uno.Array_.Copy(byte[],byte[],int)' is referenced but stripped from export (internal error)
C:\Users\MyName\AppData\Roaming\npm\node_modules\@fuse-x\studio-win\src\simulator\build\Outracks.Simulator\2.0.0-beta.8\Common\ImmutableList.cs(35): I0000: 'Uno.Array_.Copy(T[],T[],int)' is referenced but stripped from export (internal error)
```
---
### Author:  [@mortend](https://forums.fusetools.com/u/mortend)
#### Post date: [January 19, 2021, 3:40pm UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102/4 "2021-01-19T15:40:48Z")
Oh. Looks like we might have bug.
- Does it work if you run `uno clean` first?
- Does it work if you open the project inside Fuse X?
- Do you have older version of Fuse installed that could be interfering?
Otherwise, is it possible to send me your project for debugging?
mdfornes at gmail dot com
---
### Author:  [@Nereo](https://forums.fusetools.com/u/Nereo)
#### Post date: [January 19, 2021, 4:08pm UTC](https://forums.fusetools.com/t/how-to-update-old-app-from-fuseopen-1-10-to-fuse-x-last-beta/8102/5 "2021-01-19T16:08:45Z")
> [@mortend](#):
>
> - Does it work if you run `uno clean` first?
I tried to run uno clean previously but I got the same result
> [@mortend](#):
>
> Does it work if you open the project inside Fuse X?
Yes it does work inside Fuse X (I apologize, I did not try it before)
> [@mortend](#):
>
> Do you have older version of Fuse installed that could be interfering?
I had installed Fuse Open 1.10, but I unistalled it before installing Fuse X
I will give a try to fix some errors relate to my code I was not getting with Fuse Open and I’ll come back to you.
In the meantime, thank you for you kindness