The causes are as follows.

1. USB factors →Is an authorisation USB key plugged in or is the tablet connected as a media device?
2. Environmental factors →PC specifications, security issues, cable and connector issues.
3. Configuration factors →Is the database file opened in the PC software incorrect? The correct database file is ‘C:\IMV\DB-2012\Master_cvndb1.db’.

If the problem persists,please contact us.