Hello Neil and thank's for the quick reply. I love this forum
I looked up the system Info, but couldn't find any HWID, only serial #[removed] but I am just a old fart and by no means a computer crack.
The units to which the update aply are:
GPSMAP 527/527xs/547/547xs/557/557xs
GPSMAP 721/721xs/741/741xs/751/751xs
GPSMAP 820/820xs/840xs/1020/1020xs/1040xs
EchoMAP 50s/50dv/70s/70dv
Maybe that can help?
alex
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