Error with Sofware Version 10.10 for the GPSMAP 66s and 66st

[asprin624]

Sofware Version 10.10 has an error do not update your GPSMAP 66 with it.

Map page POIs are no longer displayed after v10.10 update [Bug 146]

Waiting for a fix from Garmin.

[asprin624]

BY GPSrChive at GPSrChive.com forum:

GPSMAP 66s/st Firmware Update 10.20 released 03JUN22:

Changes made from version 10.10 to 10.20:

Fixed a possible issue where POIs wouldn't appear on the map.


This update is being released in stages via Garmin Express, and should be available to everyone soon.

Please report your observations here!


The GPSMAP 66s/st version 10.20 'HotFix' has some issues.

I expect yet another release to 'fix the fix', but probably not until next week.

[asprin624]

BY GPSrChive at GPSrChive.com forum:


More update info:

We are all very fortunate that the device does not attempt installation, as the 10.20 firmware file is nearly 150% large than the 10.10 version. Seems quite clear something went very wrong when this update was compiled and Garmin did not catch it before publishing.

We will have to wait and see if they upload a new 10.20 GCD or skip ahead to version 10.30.

[asprin624]

Garmin has now fixed software update 10.20 on Garmin GPSMAP 66s and 66st.

Run Garmin Express and update.

POI's are now showing again......

[Bushwalker8]

Same bug in:
66i 910 and fixed in 920
66sr 540 and fixed in 550