CF Error All of a sudden, my camera no longer seems to recognize my compact flash card. It worked beautifully prior to stopping. I thought it was the card, so switched it out with another card with same results.

check for bent CF pins

CF stands for compact flash which means you have an error with your memory card. Try removing and replacing your compact flash memory card. If that doesn't work you may need to format your memory card or replace it.

Digital Camera: How to Fix Compact Flash Memory Cards ErrorIt is not very typical for compact flash memory cards to give you an error. If you do receive an error, it most likely means that a pin within your CF card slot is bent, or your CF card has become corrupted. Unfortunately, if your CF card has become corrupted, you will need to reformat the memory card, which means that you may lose any pictures that were located on the card.
Fixing Your Flash Memory Card

You will want to remove your CF card and the batteries. Take a look inside the CF card slot to see if there is a bent pin. If you find a bent pin, you can correct this problem using a very small and skinny flat screwdriver. Moving very slowly, use the screwdriver to bend the pin back into place. You do not want to use enough force to make the pin back in one shot.
The pin does not have to be perfectly straight, but get it as close to straight as possible. Insert your CF card back into the slow very slowly. You should see the in align itself with the card. You can turn your digital camera on to verify that the compact flash memory card is now working.

You need to format new cards in the camera before using.

It is locked by the previous device. You are not allowed to use it on other devices

Check the pins in the card slot that non are bent. Other than that it means a return to Canon.

I don't have a 350D, and don't have a list of codes but I would guess the error code refers to the Compact Flash card. In the instructions to my camera, a 400D, the solution is to remove and reinstall the card, if there is still a problem, you might have to format the card. Hopefully this will help!

Dynamite,
have you tried to reformat the CF card?  If you deleted the image through your computer and not with the camera, the computer may have removed more than what was needed...

SteveK

I am having the same issue with every CF card I put in the camera. But when I put the CF cards in other card readers, the pictures are able to be viewed. Not sure why the camera isn't recognizing the pics on the cards???

Nikons and Fujis keep the CF slot powered, and "poll" it every now and then to see if a card has been removed or inserted. So yes, a camera may drain batteries much faster with a CF card than it does with an XD. But if it really does do this, then someone at Fuji deserves to be on the street, looking for a new job. Polling a card every few seconds does not have to be a traumatic experience to the camera. A Nikon can sleep for months, and not show appreciable battery drain. After what I've seen in the horribly slow CF write times of the S3, and the large artificial difference in write times between CF and xD on that camera, I'd say someone (or several "someones") at Fuji is doing everything in their power to make CF look bad and steer people into xD.