took the wife about 20 hrs to resolve the problem.

data is written from the sd chip to the tomtom memory and stored there. the tomtom runs on the data stored in the memory. the backup is created from the sd chip to a computer. wife had done that.

apparently, when tomtom builds these machine, they load the data directly to the memory. the files on the chip were defective, so wife had a defective backup.

she finally determined the defect when she realized the files on the computer and the chip were the wrong size.

tomtom gave her the new software, and a year subscription for her troubles.

the files have grown, and barely fit on a 1 gig chip(890meg). is time to buy a new 2 gig chip.