CrashWatcher

v1.1.0·Updated 2026-10-10

The crash window of CatLib: a small Windows program that waits for the game to close and, if it crashed or froze, shows what happened and keeps a report. Comes with CatLib.

About this mod Author’s original text

CatLib Crash Watcher

The crash window of CatLib. You don't need to install it yourself: it comes with CatLib.

When Cat Mail Co. closes by itself or freezes while quitting, a small window tells you what happened in your language

and keeps a report folder with everything a mod author needs to fix it. Send that folder with your bug report.

What it does

  • Starts together with the game and waits for it to close. On a normal quit it closes too and leaves nothing behind.
  • After a crash it shows a small window: what happened in one line, the details, and buttons to open the report folder or copy the report.
  • Keeps the report in BepInEx/CatLib/Crashes: the report, both game logs and a memory dump of the moment of the crash.

Only the last 10 reports are kept, dumps only in the last 3.

  • Notices when the game hangs while quitting and says so in the report.

What it doesn't do

  • It sends nothing anywhere. The report stays on your computer until you attach it yourself.
  • It doesn't change the game. To write a memory dump it follows the game the way a debugger does,

which pauses the game only for the moment of writing.

It is a separate Windows program, CatLib.CrashWatcher.exe, because a program can't report its own crash reliably from the inside.

Source code: tools/CatLib.CrashWatcher,

how it works: Crash reports.

Settings

Settings → Mods → CatLib:

  • Crash window: turn the whole thing off.
  • Crash dump: keep the window and the report, but without the memory dump.

Found a bug?

Report it on GitHub.

If the crash window itself misbehaved, attach BepInEx/CatLib/Crashes/watcher.log too.

Install & use Install: follow the bundled instructions

  1. Unzip the archive from playbuff and read the bundled readme / instructions first.
  2. Most mods rely on the game's mod loader — the usual route is a community mod manager (such as r2modman): pick this game, install, and it handles the loader and dependencies.
  3. For a manual install, put the mod files into the matching Mod / plugins folder inside the game directory.
  4. Launch the game to confirm it loaded; mods with listed dependencies need those installed as well.

Install locations vary a lot between mods — the bundled readme is the most reliable guide.

File & checksum

Filename
CrashWatcher-1.1.0.zip
File size
161.1 KiB