Well I think it's the card reader.
Is it possible to upload from the gt31 straight to the computer/ka72 ? If so could you talk me through it?
Cheers

Brad,
Possible problems;
-Older cards can get corrupted and won't write to card
-the GT31 pins aren't making contact with the card
-the card slide lock might be slipping and preventing GPS writing to card
-I can't think of a fourth reason but thought it would look stupid bullet pointing only three issues

You can extract session data as a GPX file (I think) in Navilink but I haven't done it for so long so I'm not much help there. Don't think you can upload a GPX file directly to Dylan's site but once again I have been wrong before.

Hope you're well too.
Cheers,
Sausage

Quite likely the card reader.
I couldn't upload my data a while back, just happened to have another card reader around, tried it, and no problems.

KA72 accepts GPX files, so you're good to go there.

www.seabreeze.com.au/