# Installing a new test project failed

**URL:** <https://discourse.processing.org/t/installing-a-new-test-project-failed/8405>\
**Category:** Processing for Android\
**Created:** [February 14, 2019, 6:53pm UTC](https://discourse.processing.org/t/installing-a-new-test-project-failed/8405 "2019-02-14T18:53:12Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Banansplitt](https://avatars.discourse-cdn.com/v4/letter/b/ed655f/32.png) [@Banansplitt](https://discourse.processing.org/u/Banansplitt)\
**Post date:** [February 14, 2019, 6:53pm UTC](https://discourse.processing.org/t/installing-a-new-test-project-failed/8405/1 "2019-02-14T18:53:12Z")

</div>

The build is successful, but installing it on my android device is failing. I get the following error:

```auto
C:\Users\xxxxx\Documents\Processing\android\sdk\platform-tools\adb.exe -s V4QBB18918150321 install -r C:\Users\xxxxx\AppData\Local\Temp\android8409716540837577212sketch\app\build\outputs\apk\debug\xxxxx.apk
    status: 1
    6543ms
    stdout:

    stderr:
adb: failed to install C:\Users\xxxxx\AppData\Local\Temp\android8409716540837577212sketch\app\build\outputs\apk\debug\xxxxx.apk: Failure [INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package package.package.package signatures do not match the previously installed version; ignoring!]
Shutting down any existing adb server... Done.

```

I managed to install one app, but when I tried installing another one, I got the error. I did not change the package signature between the downloads, and the package name that is displayed is the one I’m using when installing. Then I tried uninstalling the old app and the error still wouldn’t go away.

How can I fix this?