in ubuntu 20 version and dunfell setup my application are getting deleted once its getting build

Is it Ubuntu 20.04 (LTS) or Ubuntu 20.10? "Ubuntu 20" isn't a thing

sorry it is ubuntu 20.04(LTS)

it is ubuntu 20.04(LTS)
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From: <email address hidden> <email address hidden> on behalf of actionparsnip <email address hidden>
Sent: Wednesday, November 16, 2022 3:35 PM
To: Sneha A <email address hidden>
Subject: Re: [Question #703838]: in ubuntu 20 version and dunfell setup my application are getting deleted once its getting build

Your question #703838 on Ubuntu changed:
https://answers.launchpad.net/ubuntu/+question/703838

    Status: Open => Needs information

actionparsnip requested more information:
Is it Ubuntu 20.04 (LTS) or Ubuntu 20.10? "Ubuntu 20" isn't a thing

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Does this help?
https://docs.yoctoproject.org/1.8/yocto-project-qs/yocto-project-qs.html

i have followed the install process of dunfell setup https://github.com/linux4sam/meta-atmel/tree/dunfell the dunfell setup is done after that while building any application or any images it is getting deleted automatically . Is there any solutions for this ?

Yocto dunfell is a software from outside Ubuntu. You cannot expect support for it on the Ubuntu pages, but you better ask at the source from which you downloaded it.

Maybe the following pages are helpful:
https://docs.yoctoproject.org/3.1.20/
https://docs.yoctoproject.org/3.1.20/ref-manual/resources.html

What happens when you try the "Hello World" example https://docs.yoctoproject.org/bitbake/1.46/bitbake-user-manual/bitbake-user-manual-hello.html