Fixing Command PhaseScriptExecution Failed: A Step-by-Step Guide to Resolving Non-Zero Exit Codes

The error “Command PhaseScriptExecution failed with a nonzero exit code” is a common issue in Xcode, often encountered during the build process. This error indicates that a script phase has failed to execute properly, leading to a failed build. It typically arises from dependency issues, syntax errors, or outdated pods, and can significantly disrupt the development workflow by preventing successful builds.

Understanding the Error

The error “Command PhaseScriptExecution failed with a nonzero exit code” typically occurs during the build process in Xcode. Here’s a breakdown:

• Nonzero Exit Code: This indicates that a script has encountered an error and terminated unsuccessfully. In Unix-like systems, an exit code of 0 means success, while any nonzero value signifies an error.
• Common Causes:
  • Dependency Issues: Missing or outdated dependencies can cause scripts to fail.
  • Script Errors: Syntax errors or incorrect paths within the script.
  • Permission Issues: The script might not have the necessary permissions to execute certain commands.
  • Environment Variables: Incorrectly set or missing environment variables required by the script.

To fix this error, you can try clearing the build cache, reinstalling dependencies, and checking the script for errors.

Step-by-Step Solution

Sure, here are the steps to fix the error “command phasescriptexecution failed with a nonzero exit code”:

1. Clear Build Cache:

   • Open Xcode.
   • Go to Product > Clean Build Folder.

2. Reinstall Pods:

   • Open Terminal.
   • Navigate to your project directory.
   • Run the following commands:

     rm -rf Pods
     rm Podfile.lock
     pod install
     

3. Check Script Permissions and Paths:

   • Ensure your script files have the correct permissions. You can set executable permissions using:

     chmod +x path/to/your/script.sh
     

   • Verify the paths in your script are correct and accessible.

4. Additional Steps:

   • If the error persists, check the Report Navigator in Xcode for more details.
   • Ensure all dependencies are correctly installed and up-to-date.

These steps should help resolve the error.

Common Pitfalls

Here are some common mistakes to avoid when addressing the “command PhaseScriptExecution failed with a nonzero exit code” error:

1. Overlooking Environment Variables:

   • Ensure all necessary environment variables are correctly set. Missing or incorrect environment variables can cause scripts to fail.

2. Failing to Update Dependencies:

   • Always update your dependencies. Outdated or incompatible dependencies can lead to this error.

3. Ignoring Build Settings:

   • Verify your build settings in Xcode. Incorrect settings can trigger this error.

4. Not Cleaning the Build Folder:

   • Regularly clean the build folder to remove any corrupted files that might cause issues.

5. Syntax Errors in Scripts:

   • Double-check your scripts for any syntax errors. Even a small typo can result in a nonzero exit code.

6. Neglecting to Reinstall Pods:

   • If you’re using CocoaPods, delete the Podfile.lock and the Pods folder, then run pod install again.

Avoiding these common pitfalls can help you resolve the error more efficiently.

Advanced Troubleshooting

1. Clear Build Cache: Go to Xcode > Product > Clean Build Folder.
2. Reinstall Pods: Delete Podfile.lock and the Pods folder. Run pod install in the terminal.
3. Check Report Navigator: Navigate to the Report Navigator in Xcode to get detailed error logs and pinpoint the exact cause.
4. Update Scripts: Ensure all scripts in the Build Phases are up-to-date and correctly configured.
5. Permissions: Verify that all necessary permissions are granted for script execution.
6. Environment Variables: Confirm that all required environment variables are correctly set.
7. Expert Assistance: If the issue persists, consider reaching out to expert forums or professional support services.

To Fix the Error ‘Command PhaseScriptExecution Failed with a Nonzero Exit Code’ in Xcode

Follow these steps:

1. CLEAR THE BUILD CACHE BY GOING TO PRODUCT > CLEAN BUILD FOLDER.
2. REINSTALL PODS BY DELETING Podfile.lock AND Pods FOLDER, THEN RUNNING pod install IN THE TERMINAL.
3. CHECK SCRIPT PERMISSIONS AND PATHS, ENSURING THEY ARE CORRECT AND ACCESSIBLE.
4. VERIFY ENVIRONMENT VARIABLES ARE CORRECTLY SET.
5. UPDATE DEPENDENCIES AND SCRIPTS TO ENSURE THEY ARE UP-TO-DATE.
6. REGULARLY CLEAN THE BUILD FOLDER TO REMOVE CORRUPTED FILES.
7. DOUBLE-CHECK SCRIPTS FOR SYNTAX ERRORS.
8. IF USING COCOAPODS, DELETE Podfile.lock AND Pods FOLDER, THEN RUN pod install AGAIN.

Avoid overlooking environment variables, failing to update dependencies, ignoring build settings, not cleaning the build folder, and neglecting to reinstall pods.