Configuration File Not Loaded from Environment

1. Config file not in correct location (not in classpath or working directory)
2. Filename doesn't match application's expected name (application.yaml vs application.yml)
3. Config file excluded from build (not copied to target or dist directory)
4. Working directory at runtime different from expected location
5. Spring profile active but matching config file (application-prod.yml) not found

Verify config file location: should be in src/main/resources/ or current working directory. Check filename matches expected: application.properties, application.yml, or .env. Confirm file is included in build artifacts. Log configuration source at startup. Use explicit path: java -jar app.jar --spring.config.location=/path/to/config.yml