ThingMagic M5e-Compact - Manual (Page 212)

Common Error Messages
212 Appendix C: Error Messages
Solution
Make sure the number of arguments matches the data length.
FAULT_INVALID_OPCODE – 101h
Cause
The opCode received is invalid or not supported in the currently running program
(bootloader or main application) or is not supported in the current version of code.
Solution
Check the following:
Make sure the command is supported in the currently running program.
Check the documentation for the opCode the host sent and make sure it is correct
and supported.
Check the previous module responses for an assert (0x7F0X) which will reset the
module into the bootloader.
FAULT_UNIMPLEMENTED_OPCODE – 102h
Cause
Some of the reserved commands might return this error code.
This does not mean that they always will do this since ThingMagic reserves the right to
modify those commands at anytime.
Solution
Check the documentation for the opCode the host sent to the reader and make sure it is
supported.