> For the complete documentation index, see [llms.txt](https://developer.harness.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.harness.io/release-orchestration/troubleshooting-and-resources/release-orchestration-troubleshooting/variable-mapping-errors.md).

# Variable Mapping Errors

Learn how to identify and fix variable mapping errors in Release Orchestration.

Variable mapping errors occur when variables cannot be resolved or mapped correctly.

<details>

<summary>Undefined variables</summary>

**Problem**: A variable is not defined.

**Solution**:

* Check the variable definition.
* Verify the variable scope.
* Provide default values.

</details>

<details>

<summary>Type mismatches</summary>

**Problem**: A variable type mismatch occurs.

**Solution**:

* Check variable types.
* Convert types if needed.
* Validate types.

</details>

## Resolution

Validate variables to confirm they are defined, scoped, and typed correctly.

**Variable validation**

* **Check definitions**: verify definitions.
* **Check scope**: verify scope.
* **Check types**: verify types.
* **Test mapping**: test mappings.

## Related topics

* [Common issues](/release-orchestration/troubleshooting-and-resources/release-orchestration-troubleshooting/common-issues.md)
* [Execution failures](/release-orchestration/troubleshooting-and-resources/release-orchestration-troubleshooting/execution-failures.md)
* [Stuck releases](/release-orchestration/troubleshooting-and-resources/release-orchestration-troubleshooting/stuck-releases.md)

{% @harness-feedback/feedback %}