---
title: "SW30001: TypeScript checker facts required"
description: "The compiler needs type information for a value, but the integration did not provide it."
image: "https://stillwind.dev/og.png"
---

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# SW30001: TypeScript checker facts required

This error occurs when the compiler needs TypeScript type information to compile
a value, but the integration compiled the file without it. Examples are a ref
chosen by a condition, or an animation imported from another module. The message
names the kind of value.

## How to fix

- With an official integration, update the Stillwind packages. If the error
  remains, report it with the file that causes it.
- In your own integration, run the type queries before compilation, and pass
  their results with the same revision of the source.

Type information that exists but does not match the source is reported as
[SW30002](/docs/errors/SW30002).

Source: https://stillwind.dev/docs/errors/SW30001/index.mdx