Cambridge 302 problem: "Could not get FAT.(A)" while trying to download flight logs

Hi

Our 302 unit with V2.50 firmware in it will not transfer Flight Logs
after
bombing out mid-way on a previous transfer.

I am using a Windows 2000 PC with Utility V2.55, which has previously
downloaded logs without any trouble.

Now, when I click on the button to start the transfer, it does not
display
any logs to choose from. Instead, there is an error dialog box, which
says "300_Utility_PC255" on the title bar, and says "Could not get
FAT.(A)"
and an "OK" button

I have tried restarting the PC Utility software to no avail. I also
tried
switching off the 302 and then recycling the battery power to it.
Still, it
doesn't work.

I can use the other buttons on the PC Utility main menu to transfer
the 302's
Glider ID and Polar and Instrument Settings OK, so it *IS*
communicating. It
also seems to be working correctly as a vario, etc, though it hasn't
been
flown since that time (perhaps when it starts to write a new log it'll
clear
the old one).

Can anyone please advise what course of action I should take, or some
remedial
steps I should try.

I *DO NOT* want to lose the flight logs (there are 107 of them in
there, per
my efforts BEFORE it bombed)

Perhaps this issue is fixed by later firmware ? The CAI web site only
shows the release notes for the very latest V2.63 firmware. Is there
a set of
cumulative firmware change logs kept somewhere ? That's very useful
if a user
needs to "skip" a few versions.

Does upgrading the firmware cause the logs to be cleared ? (I don't
want
this to happen if at all possible)

I look forward to help from anyone out there that may be able to
assist with this problem

Thanks in advance

Jason