Im Forum Developer mkgmap wurde berichtet, dass einige OSM Maps auf dem Etrex nicht funktionieren ab Firmware 4.8... Zitat von dort :"So an update. Firmware version 4.80 really does not seem to work with the OSM map generated by mkgmap. I tried many things including a full factory reset.
Reverting to firmware version 4.70, and the map is back.
Sorry that I can't throw any more light on the matter. As I said my
contour maps (which I thought were generated also by mkgmap) *did*
work. And as I also said, the Garmin showed the map and allowed it
to be Enabled/Disabled, but otherwise did not seem to work. " Ende Zitat.
Die Karten von Felix Hartmann waren schon immer sehr speziell... Der hat seine spezielle Philosphie. Teste mal Karten aus anderer Herkunft, um auszuschließen das es an der speziellen Karte liegt....