Hello and thank you for your question. I look forward to assisting you today. Does it display a specific error message?
Do all of your cards give you the same error?
Does your wife have the same type of camera?
Okay. If you do not have anything worth saving on one of the cards, try inserting it into your PC and formatting it. After the format is complete, try it again in the camera.
This is after the format?
Power the camera off, insert the SD card, then press both format buttons. If that doesn't work, power the camera up with the card inserted and try with both format buttons. Get back to me when you can.