Aberdeen progressed to the fifth round of the Scottish Cup with a convincing victory over Forfar Athletic.
The Scottish Premier League side moved into the lead when Scott Vernon volleyed into the net on 31 minutes.
Mohamed Chalali doubled the Dons' advantage before the break and Rory Fallon headed the visitors' third in the 71st minute.
Mitch Megginson rounded Forfar goalkeeper Greg Paterson to complete the scoring late on.
Having been knocked out of the Scottish League Cup by East Fife earlier this season, Aberdeen were eager to avoid another defeat at the hands of Second Division opposition.
Paterson blocked a low Ryan Jack drive in the opening minutes before the Dons suffered an injury blow, Peter Pawlett limping off to be replaced by Chris Clark.
A Rory McArdle header beat Paterson and squirmed over the line but the offside flag ensured the score remained goalless.
And Aberdeen were forced into a second substitution when Isaac Osbourne hobbled off and had his place taken by Fallon.
Forfar threatened when Greg Ross fired just wide at the near post.
But Craig Brown's side soon moved into the lead when Kari Arnason, captaining the side following Richard Foster's departure, launched a long throw-in into the danger area and Vernon connected well to score.
And, 10 minutes later, Chalali seized upon an error by Forfar skipper Marc McCulloch and finished well past Paterson.
Fallon headed off target from a Fraser Fyvie corner minutes into the second half and the New Zealander then set up Chalali for a shot that was well saved by Paterson.
Dons keeper Jason Brown had to be alert to stop Chris Templeman's volley as the hosts tried to claw their way back into the tie.
But their chances were all but extinguished when Vernon's cross was flicked on by Chalali and Fallon's diving header beat Paterson.
Megginson came on for Chalali and latched on to a Jack header before evading Paterson and claiming the fourth and final goal six minutes from the end.