Diagnostics

When you ask for help or report a problem, you can export a diagnostics bundle. The bundle is a .zip file. The launcher does not send it automatically. You decide who gets it.

Export the bundle

1. Open Settings › About.
2. In the Diagnostics row, click Export….
3. Select a location for the file.

When the launcher saves the file, a message shows its location.

Contents of the bundle

File	Contents
about.txt	The launcher version, the operating system and architecture, the number of games, and the number of accounts
settings.txt	The default memory, the interface preferences (language, appearance, theme, fonts, wallpaper, translation, and others), the download concurrency, the number of mirrors, the download source, and the default window size and full screen setting of games
java.txt	Each Java that the launcher found: its version, vendor, architecture, off state, and location
instances.txt	Each game: its ID, game version, loader and loader version, installation state, and play time
activity.txt	The last 50 tasks that finished, with their results
logs/	The latest.log file of each game, and the output of the game from its last launch
launcher/	The log of the launcher, and the previous log if the current log became full

For Java arguments, game arguments, and environment variables, the bundle contains only the number of items. For the Before launch, Wrapper, and After exit commands, the bundle tells only if each command is set. It does not contain the commands.

Hidden contents

When the launcher exports the bundle, it replaces these items with placeholder text:

Item	Replacement
The player name of each account	<player>
The UUID of each account	<uuid>
The data folder of the launcher	<launcher>
Your home folder	~

Limits

• Paths that are not in your home folder stay as they are. An example is the location of a Java in a system folder.
• Game logs can contain chat text and server addresses. The launcher does not hide them.
• Before you share the bundle, you can open the .zip file and examine its contents.