If you can find the loop you can bring them up with a crochet hook. Amy has video on fixing mistakes.
My concern, though, is that if they're on the cast-on edge, that there is no loop to bring up.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry