[BigSkyFreeper]

The flaps probably got iced up and locked, preventing proper roll.

[reagandemo]

"The flaps probably got iced up and locked, preventing proper roll."
You set the flaps prior to starting your take off roll. If the flaps were stuck they would not have initiated their roll.

[JoeV1]

The flaps probably got iced up and locked, preventing proper roll.

Maybe, but part of the pre flight check just before accessing the active runway is to operate the flaps as well as all other movable control services just to make sure they are in fact they have the full travel necessary to control the aircraft.