It can likely be reset by following the instructions below. Most of the bread machines I have used follow the same sort of reset process. If you provide the brand and the model you have I can research the correct reset method. This information will also come with the instruction booklet that came with your machine. If you have that handy.
Press and hold the Stop/Start button for ten seconds to cancel the program. If this is ineffective ***turn the bread maker off at the power for twenty minutes*** and the bread maker will reset.
I hope this helps.
Monte