----------------------------------------==> Erasing: /dev/mmcblk1----------------------------------------108+0 records in108+0 records out113246208 bytes (113 MB) copied, 8.81422 s, 12.8 MB/s----------------------------------------108+0 records in108+0 records out113246208 bytes (113 MB) copied, 6.61329 s, 17.1 MB/s----------------------------------------==> Erasing: /dev/mmcblk1 complete----------------------------------------!==> Could not find /boot/SOC.sh, no defaults are loaded----------------------------------------================================================================================Writing bootloader to [/dev/mmcblk1]----------------------------------------==> Figuring out options for SPL U-Boot copy ...===> Will use :==> Figuring out options for U-Boot copy ...===> Will use :==> Copying SPL U-Boot with dd if= of=/dev/mmcblk1------------------------------------------------------------dd: opening `': No such file or directoryTraceback (last called is first):_dd_bootloader() in ./functions.sh:717prepare_drive_reverse() in ./functions.sh:1354main() in ./beaglebone-black-make-microSD-flasher-from-eMMC.sh:42The command dd if=${dd_spl_uboot_backup} of=${destination} ${dd_spl_uboot} exited with exit code 1.================================================================================Tearing Down script environment==> Unmounting /tmpumount: /tmp: not mounted==> Unmounting /bootumount: /boot: not mounted==> Stopping Cylon LEDs ...==> Setting LEDs to==> Force writeback of eMMC buffers by Syncing: /dev/mmcblk1./functions.sh: line 204: 5973 Terminated cylon_leds----------------------------------------100000+0 records in100000+0 records out51200000 bytes (51 MB) copied, 2.55928 s, 20.0 MB/s----------------------------------------===> Syncing: /dev/mmcblk1 complete==> This script took 44 seconds to run==================================================================================> Setting LEDs to