# ERROR: Couldn't find env file: .env: line 5: syntax error: unterminated quoted string

- **ID:** `docker/env-file-syntax-error`
- **Domain:** docker
- **Category:** config_error
- **Verification:** ai_generated
- **Fix Rate:** 95%

## Root Cause

The .env file referenced in docker-compose.yml contains a syntax error, such as an unclosed quote or invalid variable assignment.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| Docker Compose v2.24.2 | active | — | — |
| Docker Compose v2.25.0 | active | — | — |

## Workarounds

1. **Open .env file and check line 5: ensure all quotes are balanced. For example, change KEY='value without closing to KEY='value'.** (95% success)
   ```
   Open .env file and check line 5: ensure all quotes are balanced. For example, change KEY='value without closing to KEY='value'.
   ```
2. **Use a linter to validate .env syntax: envsubst < .env | grep -n '=' and fix any lines with missing quotes or spaces.** (90% success)
   ```
   Use a linter to validate .env syntax: envsubst < .env | grep -n '=' and fix any lines with missing quotes or spaces.
   ```

## Dead Ends

- **** — Deleting the .env file and recreating without fixing the syntax just replicates the error. (90% fail)
- **** — Escaping characters incorrectly (e.g., using backslashes) may introduce new parse errors. (50% fail)