---
title: KM00011: ERROR_KeyMissingToGapOrSwitch
---

|            |           |
|------------|---------- |
| Message    | key id='<param>' must have either output=, gap=, or layerId=\. |
| Module     | [kmc-ldml.CompilerMessages](kmc-ldml.compilermessages) |
| Identifier | `ERROR_KeyMissingToGapOrSwitch` |