Failed search on Zumo 660 after img install

If you can pre-plan on a PC. Do the search on the PC, zoom in on openstreetmap with the destination in the center, note the Lat long see https://www.openstreetmap.org/#map=17/52.14031/-0.04495 the N =52.14031 and the West (=minus sign) =0.04495 in this case. On my Garmins I do "where to" "Coordinates" set format "h ddd.dddd" ( as used by Openstreetmap) type in n 52.14031 w 0.o4495 "next" Does the map show the correct place yes? then "Go!" this works for me which is OK if you can pre-plan. If on the road "Where to" "Browse Map" browse and do a "Go"

Have a look on openstreetmap.org map to see if those addresses you have searched for are mapped. You may find that the Garmin suitable osm maps for your area may be fine for the road network but are lacking address details. For my country the best that can be expected is to find the street name and town but not the house numbers and I expect this is a common situation in most countries. The $400 you pay buys comprehensive datasets I expect, but I have a new Toyota and the address details and trying to enter a route are very poor so far for such expensive equipment and they charge over $300 for updated maps, so throwing more money at the problem does not always help. I wish you well with solving the address problems in the osm map for your country.