Same issue: Trying to update my 32bit board from c2.40 b8 to v2.42 b6 and i get the same error (MacOS X 10.9.4). For me it worked quite good on v2.40 b8 except for various issues like:
- It didn't recognize the correct number of poles of the motors. - The PID was totally freaking out!
I waited so long for an update, but now it works even worse than before!!
i have exactly the same problem and i think all person that connect the card to a mac to tune the card, then can't upgrade the card to a pc after, as if the mac had written some things in the card that don't permit an upgrade with a pc, later.
It's just an observation: each time somebody has this problem, he has used the card with a mac before trying to upgrade with a pc later !
Question: how work the "reset button" ? For me it don't do nothing, all PID tune are the same after reset the card.