Sense code 1018

MU sequence exception: An SNA/DS transaction program detected an improper sequence of SNA/DS MUs.

Bytes 2 and 3 following the sense code contain sense-code-specific information.
0001
A DMU has been received, but the MU_id has already been terminated.
0002
The MU_id state received from the partner is incompatible with the state in the MU_id registry.
0004
A previous terminate conversation indication has been ignored.
0005
An RRMU was received but was not followed by a change_direction indicator (the receive_and_wait verb issued after receiving the RRMU, returned something other than what_received=send).