Pentax Optio 450 Operating Manual page 147

Deleting
Image folder could not
be created.
This card is not
formatted.
Compression error
Image protected
Alarm set
The image is being deleted.
The largest file number is assigned to an image and
no more images can be saved. Insert a new SD
Memory Card/MultiMediaCard or format the SD
Memory Card/MultiMediaCard. (p.124)
The SD Memory Card/MultiMedia Card you have inserted
is unformatted, or has been formatted on a PC or other
device and is not compatible with this camera. (p.124)
Compression of the image you captured has failed.
Change the recorded pixels or quality levels, and take
a picture again.
The image you are trying to delete is a protected
image. (p.98)
The alarm has been enabled.
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