It is one 4gb card, that worked fine on fat32 except the autostart.
After formatting and reformating it with fat16 using Easeus PM I reinstalled CHDK using Stick.
I was able to autostart, but stopped with the mentiod error.
then I restarted the format- and installation process after changing to fat32.
the error still is the same.
all files have been copied without error.
I have no idea! I use chdk for years and never had a similar problem with a card.
after the reformatting the card with fat16 and later with fat32 I had to restart the pc, because the eyefi-center didn't recognize the the card.
but I see no connection between these problems.
one more thing- i tried to install SDM on fat16. that worked fine and autobooted too.
I then tried to replace the files with the 1.2chdk files- same error. i tried the 1.3 and both languages too. always the same error.