Conditions were considered too quick for both horses, who might now be re-routed to the Grade Two on February 16.
However, Anibale Fly currently holds an entry in the Betfair Denman Chase at Newbury on Saturday.
Anibale Fly finished third in the Cheltenham Gold Cup at the Festival last year
“We’ll just have to see. Anibale Fly is in at Newbury and there’s a race for him in Gowran. He’ll go to either of those two places,” said McManus’s racing manager Frank Berry.
“Ground has been his biggest problem for the last few months. He’s been ready to run, but just couldn’t run the way the ground has been. We’ll have to see how we get on.
“Edwulf could maybe go to Gowran as well.”
The Tony Martin-trained Anibale Fly has been restricted to just one outing this winter, at Cork in early December, while last season’s Irish Gold Cup hero Edwulf, from Joseph O’Brien’s stable, was eighth to Kemboy in the Savills Chase at Leopardstown over Christmas.
Castlegrace Paddy could also be added to a stellar line-up for the Red Mills Chase, Pat Fahy has said.
Cheltenham Gold Cup favourite Presenting Percy, the 2017 winner Sizing John and Willie Mullins’ Al Boum Photo have all been pencilled in for the contest already.
Castlegrace Paddy was an early casualty in the Dublin Chase on Saturday won by Min, but was an impressive winner of the Hilly Way Chase earlier in the season.
“It was very disappointing because I thought the one thing we could rely on was his jumping,” said Fahy.
“At Punchestown last season, he was careful at the first and we thought he didn’t jump well enough to be a top two-miler, but this year he’d been excellent.
“He ran down to the first and just didn’t jump it, it was most unusual.
“We’ll see how he is and make a plan. He was a bit sore on his shoulder, but hopefully he’ll come right soon. It’s changed the plan we had, anyway.
“The Red Mills is a possible, the timing would be pretty right if we don’t get a setback. He had no race so there’s no worry on that score, so as long as he is right soon enough it’s definitely an option.”
It capped a miserable weekend for Fahy who only had one other runner, the well-fancied Dunvegan, but he disappointed and returned clinically abnormal.
“That’s the game we’re in, unfortunately, you can never think you’ve got it sussed, but it certainly makes the good days sweeter when you have setbacks,” he said.