Panasonic LUMIX DMC-GF1K Operating Instructions Manual page 186

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The file numbers are recorded in ascending order.
• If the battery was inserted or removed without first turning the camera's power off, the folder
and file numbers for the pictures taken will not be stored in the memory. When the power is
then turned back on and pictures are taken, they may be stored under file numbers which
should have been assigned to previous pictures.
Age is not displayed correctly.
• Check the clock (P26) and birthday settings (P93).
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