Thanks for the reply,
I tried again to make a build but the result is always the same!
I noticed, however, that the card that is called from the config file is Model: Olimex A13-Olinuxino
and at the start there is an error!
U-Boot SPL 2019.04-armbian (Apr 17 2019 - 17:05:21 +0200)
DRAM: 512 MiB
Failed to set core voltage! Can't set CPU frequency
Trying to boot from MMC1
I have not made any changes I have only set Olimex A13 Som as the type of card ... is there a problem with the DT of origin?
I searched a bit in the various folders and I don't see any other references to the