Sony HDW-F900 Operation Manual page 170

If data cannot be read
If one of the following error messages appears when you push the MIC/
MENU knob in step 5, then the data was not read.
Data read error messages
Error message
NO MEMORY
STICK
MEMORY STICK
ERROR (flashing)
FILE ERROR
(flashing)
Reason
No memory stick is
inserted.
Circuit or memory stick
fault.
The memory contains data
that cannot be read with
this camcorder.
Chapter 4 Adjustments and Settings for Recording
Action
Insert or reinsert the
memory stick.
Recheck, and consult a
Sony representative.
Do not try to read data
written with another
camcorder.
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