SATO FX3-LX Operator's Manual page 449

Error Message 1010 (Media Error)
When there is an error with the printer, the error message appears on the screen.
Check the cause and countermeasure, and then take appropriate action.
To clear the error:
Load the media and open/close the top cover, or tap [OFFLINE].
Cause and Countermeasure
Cause (1)
The media size of the print data and the actual media size are different.
Countermeasure (1)
Check the media size of the print data and the actual media size again.
If the error is not solved, power on the printer again.
Cause (2)
The media size of the print data is longer than the actual media size.
Countermeasure (2)
Check the print data.
If the error is not solved, power on the printer again.
Cause (3)
The media is fed a longer distance due to the incorrect sensor level.
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