> For the complete documentation index, see [llms.txt](https://docs.yarnspinner.dev/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.yarnspinner.dev/3.1/api/csharp/yarn.compiler/yarn.compiler.diagnostic/yarn.compiler.diagnostic.diagnosticseverity/yarn.compiler.diagnostic.diagnosticseverity.error.md).

# Error

Enumeration Member in [DiagnosticSeverity](/3.1/api/csharp/yarn.compiler/yarn.compiler.diagnostic/yarn.compiler.diagnostic.diagnosticseverity.md)

## Summary

An error.

```csharp
Error = 3
```

## Remarks

If a Yarn source file contains errors, it cannot be compiled, and the compilation process will fail.