Flutter - iOS: Command /bin/sh failed with exit code 255

Question

Good afternoon,

I try to run a Flutter project on iOS, previously successfully run on Android. However, I got an error:

\"x86_64\" is not an allowed valu         


        

Answer 1

For me helped:

1. Disconnect all physical phone's from mac.
2. Close Xcode.

3. In terminal command

   flutter clean

4. Start Xcode by running Runner.xcworkspace, that you have inside your project folder /yourProjectFolder/ios/Runner

5. Choose menu Product - Archive

6. That's it! After that build was successful. Appear windows where you can distribute app.

Answer 2

I solve the problem with the following commands.

flutter clean
flutter build ios

After that I can create signed builds and also upload to App Stores.

Answer 3

This exit code (255) occurs from incorrectly Generated.xcconfig configuration like TRACK_WIDGET_CREATION, FLUTTER_FRAMEWORK_DIR, FLUTTER_BUILD_MODE In archive ios release mode. So before archiving make sure to run flutter clean then flutter build ios for some reason flutter build ios --release doesn't work for me. Then lastly go to Xcode and archive the ios app

Commands

flutter clean then

flutter build ios

Hope it helps.

Answer 4

After lots of try i follow these steps to release ipa file :

1. Go to your trminal:
2. cd your-flutter-project
3. flutter run (That will launch the app to your connected or opened device )

Now, come to again to your MAC terminal and type

• flutter build apk (that will make the release apk)

For IOS,

• flutter build ios

after complete the task you will see the path of your file package something like

/Users/Sanjeev/Documents/WorkSpaceForFlutter/myapp/build/ios/iph oneos/Runner.app.

Now go to Xcode >Product >Archive you will get the screen below

This is how i resolve my issue Command /bin/sh failed with exit code 255

Answer 5

This issue happened to me after building a release version. It seems that iOS emulators does not support release versions.

If you want to run your app on an emulator you will need to build a debug version

flutter clean
flutter build ios --debug

Answer 6

For me, it happenned that I was opening .xcodeproj (WRONG) file instead of .xcworkspace (RIGHT)