Hello everyone and @giuliomoro !

I'm following those steps with my friend to install the source of Sc in bela. After some time not recognizing the SD card, we discover that the bela 2ch kit doesn't come with a copy of the SD card to the eMMC. So we continue the process on the next days , following the steps at "Copying the SD card to the eMMC" With v0.3 or later image, we ran:

/opt/Bela/bela_flash_emmc.sh

and we get:
+ sleep 0.5
+ echo none
+ echo none
+ echo none
+ sleep 0.5
+ echo default-on
+ echo default-on
+ echo default-on
+ sleep 0.5

Do you have some tips for the coming steps? We don't want to destroy the image

*https://supercollider.github.io/development/building-beagleboneblack

Do you know what version of the beaglebone black you have ? If it's 4 or 5 years old, the eMMC may be too small to fit the Bela image. There are workarounds there if needed.

However, the most likely cause of failure is just bad luck, so can you try the process again?

Not sure what you mean by "bela 2ch kit", but if it's the Bela Starter Kit, which is a Bela Cape and a Beaglebone Black, then there is no need for an SD card, because the eMMC is already flashed. Have you tried booting it without SD card?

What do you need the source of supercollider for? Building supercollider for bela is done from a different repo (github.com/BelaPlatform/supercollider) but the version that ships with the board is already the most up to date one. I need to update the repo when I have some time, but that's also not straightforward.

    giuliomoro but the version that ships with the board is already the most up to date one. I

    That is to say: you cannot build yourself a most recent version of supercollider for Bela, but if you get an updated Bela image, then you will have it