Your post is a little confusing.
I don't know MagicISO but I assume it is either an application for extracting files from an ISO image on a CD, or for creating an ISO out of (a) file(s) to be burnt to a CD.
I am not sure how that applies to an AVI file.
An AVI is a type of video file. So what are you attempting to do with it?
Mark
i always getting 'cannot open avi' error msg in the application for wat ever thgs i do.such as extract or save image...what wrong with it??anyone hav the similar problem.i tried many version of the software.include the newest.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic