Chip & PIN not working, on display: 'Log is xx percent full'

Occasionally a message appears on the Chip & PIN machine like the one below:

 This message could mean that your Chip & PIN isn't working anymore, and needs minor maintenance.

The first thing you could try to do is the following on RetailVista POS ( i.e. 'the till').:

• Log in to RetailVista POS.
• Select the 'File' menu on the left-top.
• Choose 'PaymentSense EFT Configuration'.

• Choose 'Print financial counters'.

 After this Chip & PIN should work again. If Chip & PIN still isn't working contact PaymentSense support via their support desk.