this db has worked perfectly for months but now i've had to send them this email to let them use it at all
"First go tools the tools menu, then to the database utilities, then linked table manager. Check HIS_T_HISSHIFT_STOP, HIS_T_HISSHIFTS and Always prompt for new location then click okay choose the Barco link and fill in the password. This should solve the problem for a while, note you may need to do the above twice to solve the problem"

what the hell has happened and how do i permantly fix it?