By CBC News Ottawa, February 8, 2017
OC Transpo says recent failures with Presto card readers aren't being caused by the system itself, but a glitch in how the card readers process information they receive from computers on board buses.
"We made a number of fare changes and route changes at the end of last year and we uploaded a new database," said Pat Scrimgeour, director of transit customer systems and planning at OC Transpo.
Some riders have been contacting the transit authority directly — by phone and social media — to express their frustrations with the malfunctioning card readers.
http://www.cbc.ca/news/canada/ottawa/oc-transpo-presto-glitch-1.3970487