This unit is only 5 months old, aint my problem no more, I am sending it back to lowrance this week and going to let them figure this one out, after talking to them they think it may have, for some unknown reason dumped the software. Frustrating to say the least, I had just started imputting crappie brushpile waypoints, those are gone now, as I had not saved them anywhere but on the unit. Grrrrrrr! Well back to loading them again, when i get my unit back of course.