Yes have tried removing the SD card. I haven't wiped the system files, all i did was put a new map on SD card. All was working fine for a day or so. Then turned it on one morning and I get the error.
Seems the files are corrupted some how.
I have the Nuvi 3760 model, and after about 5 years - my files have also gotten corrupted. I attribute this to a change in the past few months of leaving the device on the windshield, in the HOT SUN - while the vehicle was parked. When it was new, I always removed it from the windshield and stored it in an insulated case.
AS for solving the problem, I have read previous threads and their solutions seems to involve formating the device while it's connected to a PC... then copying over the files from a previous backup of the entire system files and directories.
Please don't take my word on the subject "Corrupted files", since my info is abbreviated due to all the typing involved. The important thing you DO need to remember is it requires a backup of your devices' files and directories.