String to response code

Im am not sure why there is an issue importing the flow, I reimported from the above post without any issues.
The 2 separate examples follow the pattern [ID][Size][Parameters][checksum]:
p0205C9
ID=progress report message
Size=02 Characters in Parameters field
Parameters=05=Receiver busy
Checksum=C9

..m0853103.069B
. are received when message is in response to command
ID=model
Size=08 Characters in Parameters field
Parameters=53103.06=P25 Digital Mobile Phase 2-capable,TM9400(531), v3.06 software (3.06)
Checksum=9B