Hi Tom, With 7d080773347c1f6e0e896d9284134a2a411155d6 you committed that config SYS_MMC_ENV_DEV depends on ENV_IS_IN_FAT (in addition to others). I don't see how they are related. Maybe this was a bad copy and paste? When ENV_IS_IN_FAT then ENV_FAT_INTERFACE and ENV_FAT_DEVICE_AND_PART are used instead. Thanks, Nuno