Error code 300 or 301 is returned when Printer Open function is called.

1. Check the firmware version.
-> If it is not a production version such as X.32, the printer should be replaced.
1. VOC contents
– Printer Open function between the printer firmware and SDK does not work
2. Cause
– Old firmware before changing commands does not support the function to check the firmware version and setting values using SDK
3. Solution
– Use the latest firmware version with the routine to test the firmware version and to check the setting values.
(The latest SDK is always uploaded into the home page)