My SD Card from digital camera, says "no pictures" after taking more than 50 photos. Help me to retrieve.

Camera is D-40 Olympus made

I have had that problem with my compact flash cards sometimes. I'm not sure if it's because of how I formatted it, but I usually just re-format and start over. If it happens more than once, it might be a defective card.

There are programs that help you retrieve photos off of memory cards. That might or might not work. I'll see if I can find the websites.

well 1st find out is ur cam has an internal memory ?? if hav then pics r save there . otherwise chk ur sd card