---
title: "Thorough Catalog Rebuild"
slug: "thorough-catalog-rebuild"
updated: 2023-12-14T18:50:05Z
published: 2023-12-14T18:50:05Z
canonical: "docs.retrospect.com/thorough-catalog-rebuild"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.retrospect.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Thorough Catalog Rebuild

By default, Retrospect will perform a Fast Catalog rebuild when needed. If directed by technical support, we may recommend performing a Thorough catalog rebuild. This is frequently needed if grooming has failed or we detect a damaged backup data file. Directions for performing a thorough catalog rebuild are below:

**Windows**

1. Close Retrospect
2. Go to C:\Program Files\Retrospect\Retrospect 19.x
3. Edit the Retro.ini file
4. Under the [Options] section, add the following line and save the changes:

ForceThoroughRebuild=1

1. Open Retrospect and start the catalog rebuild again.

**Macintosh**

1. Stop the Retrospect Engine inside System Preferences
2. Go to library/application support/Retrospect
3. Edit the retro.ini file
4. Under the [Options] section, add the following line and save the changes:

ForceThoroughRebuild=1

1. Start the Retrospect Engine in System Preferences
2. Go to Media Sets>Rebuild and start a catalog rebuild of the media.