continuity error is consistency of the characteristics of people, plot, objects, and places seen by the reader or viewer over some period of time. … Continuity is particularly a concern in the production of film and television due to the difficulty of rectifying an error in continuity after shooting has wrapped up.
for example if a lady has a red jacket on then cuts to another scene around the same time and she has a blue jacket on its a continuity error.
Sam's blog 