Just had this experience on the last flight of the long weekend.
All ae redemption upgraded with eups plus fee.
At yvr and yyz there was no issue. Got my new bp and presented it at the lounge.
Just now at yeg, prior to ac255, GA at MLL wouldnt print a new BP once my upgrade cleared and also didnt allow me entry.
I gave my aeroplan number and presented my bag tag and altitude card, and still she wouldnt allow entry, saying no access when a flight is aeroplan and euped to J.
I was upset. Just wanted to use the washroom. I was not polite

Bad last ac experience from an otherwise above average weekend in terms of AC service and crew.