Possible issues and resolutions If you have multiple memory cards, initialize another memory card and take some test shots. If images can be played back normally, the card that shows the error message may be malfunctioning. Try reformatting the faulty memory card to solve the issue.
Mount the lens on the camera. Take a picture. If the error persists, the camera and/or lens may need be serviced by a qualified Canon Service Technician.
Even if the previous version of the software is installed, install the software by following the steps below (the current software will overwrite the previous version). If errors occur during installation, please see the Related Information below. IMPORTANT
2. Format the CF card. " (CF error ) is displayed on the LCD panel, it indicates that a problem with the CF card is preventing the image data from being recorded or read. Use another CF card instead.
Avoid doing the following things while running the software installed from the supplied Solution Disk, as these things may cause communications errors .