The CLSDST macroinstruction is used to terminate sessions in which the application program is acting as the PLU. CLSDST sends UNBIND requests from the PLU to the SLU to terminate sessions for which BIND has been sent (active and pending active sessions), and rejects any CINIT requests for which OPNDST OPTCD=ACCEPT has not yet been issued. CLSDST will also terminate a queued session by sending a Terminate. Additionally, CLSDST can be used to initiate the next session for the SLU.