If you’ve encountered the error message “A fatal error occurred when running Fusee,” you’re likely dealing with an issue that can prevent certain processes from completing—specifically related to the use of the Fusee Gelee exploit for Nintendo Switch. This exploit is often used for homebrew purposes, such as custom firmware installation or running unsigned code. While it offers a lot of freedom for those who know what they’re doing, it can also trigger errors if something goes wrong in the process.
In this article, we’ll walk you through the causes of the error and how to fix it.
Contents of Post
What Is Fusee Gelee?
Before diving into the fix, it’s important to understand what Fusee Gelee is. Fusee Gelee is a bootrom exploit used to hack the Nintendo Switch. It allows users to run unsigned code by exploiting vulnerabilities in the Switch’s boot process. Many homebrew enthusiasts use it for installing custom firmware (CFW) like Atmosphere or for other purposes like running unofficial games.
The “fatal error” can appear if something interferes with the exploit’s execution, such as hardware issues, software conflicts, or corrupted files.
Common Causes of the Error
There are several potential causes for the “A fatal error occurred when running Fusee” message:
- Improper USB Cable Connection: The Switch needs to be connected to your computer properly for Fusee Gelee to work. If the USB cable is faulty, loose, or incompatible, the exploit won’t run as expected.
- Incorrect Payload: If the payload being injected into the Switch is corrupt or mismatched, Fusee Gelee will fail to execute.
- Firmware or Software Conflicts: If your Switch firmware version is incompatible with the tools you’re using (e.g., an outdated Atmosphere version or an unsupported firmware version), it can cause the exploit to fail.
- Corrupted SD Card: If the SD card inserted into your Switch is corrupted or not formatted properly, it can cause issues when trying to load necessary files for the exploit.
- Bootloader Issues: The bootrom used for running the exploit might not be responding correctly, potentially due to hardware malfunctions or incomplete installations.
How to Fix ‘A Fatal Error Occurred When Running Fusee’
1. Check USB Cable and Connection
First, ensure that your USB cable is in good condition and is properly connected. Ideally, you should use a data-capable USB cable (as opposed to just a charging cable). Disconnect and reconnect the cable, ensuring it’s securely plugged into both the Switch and the computer.
If you’re using a USB hub, try connecting directly to the computer instead. Sometimes hubs can introduce issues that interfere with the exploit.
2. Verify the Payload
Make sure you’re using the correct and updated payload for your version of the Switch firmware. You can find payloads for different firmware versions from trusted sources such as Atmosphere’s GitHub or community-driven websites.
- Download the latest stable version of the payload.
- Use a payload injector or software like Hekate or TegraRcmGUI to send the payload to your Switch.
- Double-check that you’re using the appropriate payload for your firmware.
3. Check Your SD Card
A corrupted or improperly formatted SD card can cause all kinds of issues when using Fusee Gelee. Follow these steps to check your SD card:
- Backup your data: First, back up any important files to your PC.
- Format the SD card: Use FAT32 or exFAT (depending on the size of your SD card and your Switch’s capabilities) to format the card.
- Reinstall your homebrew files: After formatting, reinstall the required files such as Atmosphere, the payload, and any other necessary homebrew apps to the SD card.
Make sure the SD card is seated properly in the Nintendo Switch.
4. Update or Reinstall Homebrew Software
Homebrew software (like Atmosphere, Hekate, etc.) needs to be up-to-date for optimal functionality. If you’re using an outdated version of Atmosphere or other homebrew software, this could be causing the issue.
- Visit GitHub for the latest stable versions of the software.
- Download the latest files and place them on your SD card.
- Try running the exploit again after updating your software.
5. Test the Switch’s Bootloader
Sometimes, the issue could be related to the Switch’s bootloader. If the bootrom is malfunctioning or incorrectly configured, it may result in a failure when running Fusee Gelee.
- You can try resetting the bootloader by holding the power button for 20 seconds to force a reboot.
- Alternatively, try entering RCM mode (Recovery Mode) again by ensuring the proper combination of button presses.
If none of these methods work, you may need to reflash the bootloader or consider seeking professional help if you’re unsure how to proceed.
6. Switch Firmware Compatibility
If you’ve updated your Nintendo Switch’s firmware to a new version, it’s possible that your current version of Atmosphere or other homebrew software isn’t fully compatible yet. Firmware updates can sometimes patch exploits, so you’ll need to ensure that the exploit is still viable for the new version.
- Check compatibility: Make sure the tools you’re using support your Switch’s current firmware version.
- Rollback the firmware: If you recently updated and suspect that the update is causing the issue, you might need to revert to a previous firmware version.
Conclusion
The “A fatal error occurred when running Fusee” issue can stem from a number of potential causes, including USB connection issues, corrupted SD cards, outdated payloads, or even firmware incompatibilities. To fix it, you’ll need to follow a systematic troubleshooting process, checking each possible cause and making necessary adjustments.
By ensuring that your payload is up-to-date, your SD card is functioning correctly, and your homebrew tools are properly installed, you should be able to resolve the error and proceed with using Fusee Gelee on your Nintendo Switch. If problems persist, consider reaching out to community forums or resources for more in-depth troubleshooting tailored to your specific setup.