Company I work for uses the SABRE reservations system. We had a number of travellers for whom E-tickets had been issued, and where BA checkin staff were unable to see the ticket data.
This meant the travellers having to pa a 2nd time for tickets, and on a number of occassions having to pay a higher fare than necessary as the e-tickets were issued at special 'negotiated' fares that the airline is not able to issue.
Seems a complete Beta testing might have not been done.
Hopefully all has now been resolved - except the hassle of having to process all those refunds for no remuneration!
Scottie Dog