Thanks for the quick reply, here is some more info.
1. Windows XP SP2
2. Garmin GPSMap 420: https://buy.garmin.com/shop/shop.do?pID=8053
I use serial NMEA
with Flexgear DB9ha-USB A ha adapter.
3. I'm not sure where to find the logfile, can you advise?
4. I did not select GRMN/GRMN(Host) mode in Toolbox->GPS. The software
is set to NMEA 0183
in and out.
Many thanks for the help,