FTB App

The FTB App is the first-party software for installing FTB modpacks, ensuring the FTB modpacks you download are in their intended form and have the most up-to-date versions available. The FTB App also supports CurseForge modpacks, and downloads CurseForge mods using the CurseForge API to support mod developers.

Files and folders

How to find the default folder

  • Windows

    • Press Windows + R and type %localappdata%/.ftba.

  • MacOS

    • Open a new Terminal and type open ~/Library/Application\ Support/.ftba.

  • Linux

    • Navigate to the ~/.ftba directory.

Folder contents

  • /.doh_cache - Folder for DNS over HTTPS, containing DNS communication information

  • /bin

    • /assets - Minecraft assets
    • /libraries - launcher related files
    • /runtime - Java binaries
    • /versions - Forge jars

  • /instances - Folders for each modpack you have installed

  • /logs

    • debug.log - Verbose logs that were recorded while the FTB App was last open
    • latest.log - Logs that were recorded while the FTB App was last open

  • /storage - Stores a JSON file with version information

  • profiles.json - Stores profile information for Minecraft and Xbox, including tokens

  • subprocess.pid - Stores a process ID

Modpack folders

  • Found on the modpack's page in the FTB App, clicking Settings, and clicking Open Folder at the bottom.

Providing logs

Logs can be provided in one of two ways:

  1. Manually providing your logs found in the next section.

  2. Using a tool FTB distributes to share your logs to others called the FTB Debug tool. This tool has instructions and is available for several operating systems and architectures:

Which logs should I send?

My server is having issues:

  • For server logs, you'll have to know where you put your server's folder, or find it on your hosting provider's control panel or through FTP (depending on your host).

  • Reference the general logs section and provide your latest.log and any crash reports that were created at the time the server crashed.

My Minecraft client is having issues:

  • FTB modpack folders can be found by opening the modpack's page in the FTB App, clicking Settings on the right, then click Open Folder at the bottom.

  • Reference the general logs section and provide your latest.log, any crash reports that were created at the time you crashed, and look for any Java runtime crashes.

My FTB App is having issues:

  • In your FTB App's folder look for a folder called logs, open it and find a file called latest.log or latest.

Logs can be provided as-is in their original file format.