---
title: KM02900: FATAL_UnexpectedException
---

|            |           |
|------------|---------- |
| Message    | This is an internal error; the message will vary |
| Module     | [kmc-kmn.KmnCompilerMessages](kmc-kmn.kmncompilermessages) |
| Identifier | `FATAL_UnexpectedException` |

Raised when KmnCompiler or one of its components has an internal
error. If you experience this error, it should be reported to the Keyman
team for resolution via https://github.com/keymanapp/keyman/issues/new.