Emunand won’t boot after updating Sysnand

[fringle]

I have a friends switch that has an emunand that I believe is version 19.whatever and his Sysnand was updated to the latest version. OFW boots fine but CFW throws an error. Can’t remember the error at the moment but I assume it is because OFW is of the latest version. Is there a way to update the emunand to the latest version when it doesn’t boot or am I left cleaning the sd card as the only option and starting fresh?

 

[Hayato213]

Need to know the error in order to fix it.

 

[fringle]

Need to know the error in order to fix it.

When attempting to run through payloads it returns: A fatal error has occurred when running fusee. Unable to identify payload. Press power to reboot.

If I attempt to boot CFW through the launch menu. It returns: unknown pkg1 version. Hos version is not supported or enummc corrupt! Trying backup bootloader(‘20251009153823/‘). Unknown pkg1 version. Hos version not supported or emummc corrupt! Failed to launch hos! Press any key.

I have not attempted to update the atmosphere version but wondered if updating it and hekate would maybe fix it.

 

[impeeza]

When attempting to run through payloads it returns: A fatal error has occurred when running fusee. Unable to identify payload. Press power to reboot.

If I attempt to boot CFW through the launch menu. It returns: unknown pkg1 version. Hos version is not supported or enummc corrupt! Trying backup bootloader(‘20251009153823/‘). Unknown pkg1 version. Hos version not supported or emummc corrupt! Failed to launch hos! Press any key.

I have not attempted to update the atmosphere version but wondered if updating it and hekate would maybe fix it.

YOU NEED TO UPDATE YOUR ATMOSPHÈRE AND YOUR HEKATE FILES. DO IT MANUALL FROM RELEASE SECTIONS OF OFFICIAL GITHUB.

 

[petspeed]

YOU NEED TO UPDATE YOUR ATMOSPHÈRE AND YOUR HEKATE FILES. DO IT MANUALL FROM RELEASE SECTIONS OF OFFICIAL GITHUB.

If he only updated sysmmc it shouldn't be necessary to update Atmosphere and Hekate to boot emummc?

 

[Hayato213]

If he only updated sysmmc it shouldn't be necessary to update Atmosphere and Hekate to boot emummc?

Based on the error, often it is outdated Atmosphere and hekate files, it is pointed at outdated pkg1 file.