'bb': successful (two blanks)

'AB': segment I/O area not specified.

'AD': functional parameter invalid: function call not provided to CBLTDLI, invalid function call name provided to CBLTDLI.

'QF': segment less than 5 characters.

'QH': No destination name in PCB.

'XA': trying to forward the request to another transaction after responding the request.

'XB': trying to respond the request after forwarding it to another transaction.

'XC': Z1 bit is not 0, it is reserved and always kept as 0.

'A6': Output segment size limit exceeded on call.