Hi,
you can use Serial.print(error, HEX) ; to print the error in HEx for easier debugging process.
look at the error return from the cube servo library in the link https://github.com/CytronTechnologies/Cytron-G15Shield/blob/master/Library%20References/Return%20Status.md
[img] [/img]
0xE00 means Checksum error, ID mismatch, Wrong header, this means the received packet is corrupted.