> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/error-codes/mariadb-error-codes-1300-to-1399/e1311.md).

# Error 1311: Referring to uninitialized variable

| Error Code | SQLSTATE | Error               | Description                            |
| ---------- | -------- | ------------------- | -------------------------------------- |
| 1311       | 01000    | ER\_SP\_UNINIT\_VAR | Referring to uninitialized variable %s |

## Possible Causes and Solutions

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