---
title: "Breaking: #61802 - deprecated isLocalconfWritable function removed"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-61802"
source: "Changelog/7.0/Breaking-61802-IsLocalconfWritableFunctionRemoved.rst"
typo3-version: "7.0"
typo3-major: 7
type: "breaking"
issue: 61802
forge: "https://forge.typo3.org/issues/61802"
tags: ["PHP-API"]
rendered: "2026-09-24T21:45:06+00:00"
---

# Breaking: #61802 - deprecated isLocalconfWritable function removed {#breaking-61802}

See [forge#61802](https://forge.typo3.org/issues/61802)

## Description {#description}

The function `isLocalconfWritable()` `from TYPO3CMSCoreUtilityExtensionManagementUtility` has been removed.
The bootstrap now just checks for the existence of the file and redirects to the install tool if it doesn't exist.

## Impact {#impact}

Extensions that still use the function `isLocalconfWritable()` won't work.

## Affected installations {#affected-installations}

A TYPO3 instance is affected if a 3rd party extension uses the removed function.

## Migration {#migration}

Remove the call to this function. The bootstrap takes care to check the existence of the file.