TOC making with the headaches

normally i don’t have any problems burning discjuggler images, however, lately i’ve been getting the error unable to load/store TOC," specifically with two of the last three backups i tried. i’d be inclined to believe the TOC is damaged, except for the unusual frequency, especially given that cdi2nero fails as well, saying could not find the track start mark. is there a way to rewrite or repair a damaged TOC, or otherwise extract the files from the image, or am i way off base?