ERROR: DCC Loader has reported Error Code = 0x3E (0x007FFF 0x010000)
ERROR: DCC Loader has reported Error Code = 0x3E (0x007FFF <> 0x010000)
This is returned by DCC loader in case that eMMC internal controller fails to erase/write specific block. Usually it means that eMMC chip has failed, and can not be recovered by software means.
Solution is very simple - solder new eMMC chip, repartition it and repair bootloader.