# How to upgrade legato version on red WP7702

**URL:** <https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421>\
**Category:** mangOH Red\
**Created:** [October 14, 2020, 8:51pm UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421 "2020-10-14T20:51:28Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [October 14, 2020, 8:51pm UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/1 "2020-10-14T20:51:28Z")

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Hi,

I built an app, but it failed to start up due to app legato version and system legato version mismatching:

> root@swi-mdm9x28-wp:~# app info smsApp  
> smsApp  
> status: stopped  
> app.name: smsApp  
> app.md5: d71e32e26f4be93a003ea5c5912bb872  
> app.version:  
> legato.version: 20.04.0

> root@swi-mdm9x28-wp:~# legato version  
> 19.11.2\_625c7d1acfd1ca45b2dbe189b4cb1ce7\_modified

How could I fix this? Do I upgrade system legato or degrade app legato version?

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**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 14, 2020, 11:08pm UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/2 "2020-10-14T23:08:49Z")

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Yes, you can try either method

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<div class="post-metadata">

**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [October 14, 2020, 11:11pm UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/3 "2020-10-14T23:11:08Z")

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Hi

Could you be a little bit specific, how do I degrade app legato version?

Thank you

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 14, 2020, 11:13pm UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/4 "2020-10-14T23:13:04Z")

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In the vscode, you can choose the package of profile

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<div class="post-metadata">

**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [October 15, 2020, 12:23am UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/5 "2020-10-15T00:23:53Z")

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I have been using command line, can I do it via command line?

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**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 15, 2020, 12:31am UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/6 "2020-10-15T00:31:52Z")

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Before you do mkapp, you need to go to correct package to do “. bin/configlegatoenv”

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<div class="post-metadata">

**Author:** ![jeremyzhang](https://avatars.discourse-cdn.com/v4/letter/j/4da419/32.png) [@jeremyzhang](https://mangoh.discourse.group/u/jeremyzhang)\
**Post date:** [October 15, 2020, 4:00am UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/7 "2020-10-15T04:00:58Z")

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did you mean leaf package?

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<div class="post-metadata">

**Author:** ![jyijyi](https://sea2.discourse-cdn.com/flex016/user_avatar/mangoh.discourse.group/jyijyi/32/997_2.png) [@jyijyi](https://mangoh.discourse.group/u/jyijyi)\
**Post date:** [October 15, 2020, 4:15am UTC](https://mangoh.discourse.group/t/how-to-upgrade-legato-version-on-red-wp7702/5421/8 "2020-10-15T04:15:54Z")

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are you doing the mkapp in “leaf shell”?  
If yes, you need to setup profile with dedicated package which has its legato version.