# Cannot publish App (Download) for Google Play
**URL:** https://community.thunkable.com/t/cannot-publish-app-download-for-google-play/481386
**Category:** Questions about Thunkable X
**Created:** [February 24, 2020, 10:25am UTC](https://community.thunkable.com/t/cannot-publish-app-download-for-google-play/481386 "2020-02-24T10:25:37Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@RobertKubin](https://community.thunkable.com/u/RobertKubin)
#### Post date: [February 24, 2020, 10:25am UTC](https://community.thunkable.com/t/cannot-publish-app-download-for-google-play/481386/1 "2020-02-24T10:25:37Z")
Hi there,
I run into the problem, that I get a Error notification with ‘Download Android App’ and in fact I cannot resolve the problem. Here is the message:
App Download Error: Command failed: $ANDROID\_HOME/build-tools/28.0.3/aapt package -f --no-crunch -I $ANDROID\_HOME/platforms/android-28/android.jar -M /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml -S /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/resources -m -J /backend/…/thunkableCompanion/android/app/build/generated/not\_namespaced\_r\_class\_sources/templateRelease/processTemplateReleaseResources/r -F /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/resources.apk -G /backend/…/thunkableCompanion/android/app/build/intermediates/proguard-rules/templateRelease/aapt\_rules.txt --custom-package host.exp.exponent -0 apk --output-text-symbols /backend/…/thunkableCompanion/android/app/build/intermediates/symbols/templateRelease --no-version-vectors warning: string ‘com\_facebook\_loginview\_logged\_in\_using\_facebook\_f1gender’ has no default translation. /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml:2: Tag attribute package has invalid character ‘-’. /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml:11: Tag attribute name has invalid character ‘-’. /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml:16: Tag attribute name has invalid character ‘-’. /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml:375: Tag attribute name has invalid character ‘-’. /backend/builds/d206af83-d16c-48e4-89e1-2d06d1db538e/AndroidManifest.xml:624: Tag attribute name has invalid character ‘-’.
Has anybody an idea, what I have done wrong or what I can do to solve the problem?
This app has been published successfully about 8 month ago and I had minor fixes now. I checked these fixes but cannot find any problem with them. As far as I understand this message, there are invalid characters; but how can I find them?
Thanx,
Robert
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### Author:  [@Chris](https://community.thunkable.com/u/Chris)
#### Post date: [February 24, 2020, 11:19am UTC](https://community.thunkable.com/t/cannot-publish-app-download-for-google-play/481386/2 "2020-02-24T11:19:38Z")
does your package name fulfill Googles requirements?
- It must have at least two segments (one or more dots).
- Each segment must start with a letter.
- All characters must be alphanumeric or an underscore [a-zA-Z0-9\_].
I ran into issues once when for some reason Thunkable created a package id that did not match those rules.
Best, Chris
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### Author:  [@ioannis](https://community.thunkable.com/u/ioannis)
#### Post date: [November 8, 2024, 11:40am UTC](https://community.thunkable.com/t/cannot-publish-app-download-for-google-play/481386/3 "2024-11-08T11:40:51Z")