FO4 Crash Log Auto Scanner And Setup Integrity Checker (CLASSIC)

fallout-4 — Mods & Enhancements

FO4 Crash Log Auto Scanner And Setup Integrity Checker (CLASSIC) is a utility that scans Buffout 4 crash logs, game files, and mod files to automatically detect problems in around 250 different cases. It includes a GUI and is a rebranded version of the original Crash Log Auto Scanner (CLAS). With over 6,000 endorsements and 322,000 downloads, it's a popular tool for Fallout 4 modders troubleshooting crashes.

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Downloads, ratings, compatibility info, installation guides, and user reviews.

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Syntax

Utilities

Example

Downloads: 322,372 | Endorsements: 6,255

💡 Notes

By Poet | v9.0.0 | 6,255 endorsements

🎯 Tips & Tricks

Make sure Buffout 4 is installed and configured to generate

Make sure Buffout 4 is installed and configured to generate crash logs, otherwise the scanner has nothing to read.

Run the scanner after a crash and check the 'detected proble

Run the scanner after a crash and check the 'detected problems' section for specific mod names or missing patches.

If you use a mod manager, let it handle the installation to

If you use a mod manager, let it handle the installation to avoid file placement issues.

🔧 Troubleshooting

Mod not working

Check load order and required dependencies. Read the full mod description.

⚠️ Common Mistakes

Installing multiple mods that modify the same files without checking compatibility

👍 Pros

Huge community trust with 6,255 endorsements and 322k downloads.
One-click scanning saves hours of manual crash log reading.
Covers a wide range of issues (250 cases) so you catch problems you'd miss.

👎 Cons

Requires Buffout 4 to be installed for crash logs to be generated.
GUI might be overwhelming for first-time users with no tutorial.
Last updated July 2026 – future game updates could break compatibility.

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