If a problem occurs that causes a console to become unusable and attempts to restore the console fail (for example, in response to the VARY command, the system issues message IEE339I indicating that the console is changing status), the operator does not have to re-IPL the system to recover the console. From another console, the operator can first issue the RESET CN command and then either issue the VARY CN,ONLINE command for the inactive console, or, if the inactive console is an SMCS console, logon to the console again.

For information on using RESET CN, see z/OS MVS System Commands.