# LDC-Q4009 — The attached case must be a quoted file path

## What it means

A question over a package can carry its own case: a file with the facts
to reason about, named inside the question body. The file is named by a
quoted path, so the engine can tell a path from a bare word. An unquoted
name stops the question before any file is read.

Wrap the file path in quotes. The rest of the question stays as written.

## Example

```lawql
query q over "demo.diagnostics" { for x: Applicant; where resident(x); select resident(x); case blah; }
```

## Fix

```lawql
from r in rules select r
```

## Engine message

The engine reports this in its own wording:

```text
LDC-Q4009: case requires a quoted path.
```

## Related

- [Questions to the engine](/constructs/queries/) — the shape of a question over a package.
- [LDC-Q4012](/diagnostics/LDC-Q4012/) — when the named file cannot be read.