I have an older Digital Elph. I did get an Exx error and it was a failed memory card. I took it to a PC and the PC wouldn't have anything to do with it.
Try another card?
I was wondering if any owners encountered an E18 error with the Powershot A75 as in the case of the A70? Also, has anyone ever received an E50 error with the A70? If so, what does it mean? Which Canon models are E18 safe?