It's the same thing at the beginning of every month - long lineups to load your OPUS card. Stop by the customer service counter at your local IGA to recharge your OPUS card. Participating stores are equipped with a terminal where you can recharge your monthly pass at regular STM-fare prices.
You can't purchase tickets or one-way fares at the terminals. You must have your OPUS card on hand for your purchase.
Affiliated STM points of sale do not sell OPUS cards. You must visit a métro fare control booth to buy one.
Always keep your receipt as proof of purchase. If your fare proves defective, go to any STM customer service counter