3DS:Error screens/Luma3DS exception screen

This page lists possible causes and fixes of Luma3DS exception screens. They are not applicable to every situation, but cover most common known issues. Note that the prefixes on file paths refer to the starting location. refers to the SD card, and numbers in the format of  refer to GodMode9's drive numbers.

On boot

 * Files on the SD are corrupted.
 * To fix, verify that your card is not faulty. If it is verified working, make a backup of all intact files, format the SD card, and try booting again.
 * A system save located on the NAND in  has a problem.
 * System-unique files are missing from the NAND in.

Prefetch abort (svcBreak)

 * The system's movable,, is 288 bytes but its flag indicates otherwise.
 * has bad CMACs.
 * To fix, press R+A on the  drive and  . Your system will act like it has been formatted after this, and this is intended.

Data abort

 * 's  folder is missing.
 * To fix, create this folder.
 * System titles have been deleted.
 * To fix, perform a Safe Mode update.

During use

 * Files on the SD are corrupted.
 * To fix, verify that your card is not faulty. If it is verified working, make a backup of all intact files, format the SD card, and try again.

boss (0004013000003402), data abort

 * The current firmware version is too old for SpotPass to work.
 * To fix, perform a Safe Mode update. If this does not work, you may require a CTRTransfer.

fs (0000000000000000)

 * Can be anything from SD card problems to hardware issues.

hid (0004013000001D02)

 * Potential hardware problems.

menu (000400300000__02), data abort

 * Broken HOME Menu theme.
 * To fix, go into the folder  and delete the folder matching your region, one of the following:
 * USA:
 * EUR:
 * JPN:
 * Broken HOME Menu extra data.
 * To fix, go into the folder  and delete the folder matching your region, one of the following:
 * USA:
 * EUR:
 * JPN:
 * KOR:
 * Broken HOME Menu application.
 * To fix, perform a Safe Mode update.
 * If this does not fix it, attempt to enter System Settings before the crash occurs and find the broken application in Data Management, if possible.
 * If this does not fix it, you may try to enter GodMode9 and use its title list to find the broken application - this is risky, however, and should not be attempted without guidance unless you know exactly what you are doing. For guidance, join the [Nintendo Homebrew Discord].

menu (000400300000__02), prefetch abort

 * An installation of menuhax is conflicting with your custom firmware.
 * To fix, place the  file from [this download] into , run it through Homebrew Launcher, and choose REMOVE.

menu (000400300000__02), prefetch abort (svcBreak)

 * The f000000b folder in  is broken, its exact location being at.
 * To fix, backup that folder by pressing R+A while highlighting it, then select . Once backed up, delete the folder. If this does not fix the issue, copy the folder back where it was.

pm (0000000000000000), undefined instruction

 * The installed version of Luma3DS does not support the current firmware version.
 * To fix, update CFW.

loader (0000000000000000)
If the hexadecimal number next to R0 starts with 'C' or 'D', search for it as an error code or in 3DS:Error_screens/Luma3DS_ErrDisp. These errors are usually due to corruption, such as a faulty SD card, dying game cartridge, or dirty cartridge reader.