The "Command SwiftCompile failed with a nonzero exit code" error in Xcode 16.2 indicates that the Swift compiler encountered an issue and exited with an error status during the build process. This is a general error and requires investigation to pinpoint the specific cause.

Troubleshooting Steps:

• Examine the Build Logs:

  • Navigate to the Report Navigator (left panel in Xcode).

  • Locate the failed build and open its logs.

  • Look for specific error messages or warnings preceding the "Command SwiftCompile failed" message. These details will often provide clues about the underlying problem.