A character-coded command from a logical unit for which SSCPFM=USS3270 is coded contains invalid magnetic card data. Either the card data was entered into a field that was too small, or a parity error occurred.
The command is not executed.
Reenter the command. If the magnetic card data has been entered into a field that was too small, press the CLEAR key and reenter the command, entering the magnetic card data into a larger field.