When this error comes up....
The way to fix it is by opening the HH device from My Computer..
Then open DiskOnChip then S2KHH folder...
Delete the s2k.db (database) file...
Then when you open the s2k HH program on the handheld again, it will re create this file automatically. This is the file that holds all of the settings and the pricebook so you will need to open "settings" and enter your station number, then upload the handheld using the s2k client.