It appears the scheduled job has become corrupted. Try deleting the Scheduled job and re-entering it. If it continues to fail its possible either your installation or database has become corrupted. To fix a corrupt installation perform the following steps
1. Make a backup copy of your c:\bill\calls.dat file.
2. Delete the c:\bill\html folder.
3. Download and re-install the CAM software.
If this does not fix your issue then your database has become corrupted please contact our support department firstname.lastname@example.org
to receive a database repair tool.