Hello,
Thanks for your answer.
I understand what you mean about firmware. But my question was about upgrading OSMC, not to install new firmware.
It’s true that i tried to install firmware by myself in /lib/firmware, to use EyeTV DTT deluxe Tuner with TVHeadEnd (question here). The failing of the upgrade may caused by these tests ?
What can i do to upgrade OSMC ? :-/