SATO CT4-LX Operator's Manual page 467

Error Message 1010 (Media Error)
When there is an error with the product, the error message appears on the screen.
Tap the error number button to show the details screen.
Check the cause and countermeasure, and then take appropriate action.
To clear the error:
Open and close the top cover or tap [CLEAR].
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 product
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 product
again.
Cause (3)
The media is fed a longer distance due to the
incorrect sensor level.
Reference
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Calibrate
467