Sony PMW-F55 Operating Instructions Manual page 114

Indication
Please Execute APR
Invalid setting value was reset:
Media/Clip Naming/Camera
Position
Please save All File again
* "Media(B)" for the card in slot B, "AXS Memory" for the AXS memory card.
114 Error/Warning Indications
Cause and measures
The auto adjusting of the image sensor (APR) has not been executed for a
certain period.
Execute APR by pressing the Menu dial.
The setting value of "Clip Naming" is reset because an incorrect All file is
loaded.
Save the All file again after setting the desired setting value.