To breakin a VMS system if f.ex. the SYSTEM password has been forgotten use: 1) conversational boot SYSBOOT> SET/STARTUP _OPA0: SYSBOOT> CONTINUE fix the problem $ MCR SYSGEN SYSGEN> USE CURRENT SYSGEN> SET/STARTUP SYS$SYSTEM:STARTUP.COM SYSGEN> WRITE CURRENT SYSGEN> EXIT $ @SYS$SYSTEM:STARTUP 2) conversational boot SYSBOOT> SET UAFALTERNATE 1 SYSBOOT> CONTINUE fix the problem $ MCR SYSGEN SYSGEN> USE CURRENT SYSGEN> SET UAFALTERNATE 0 SYSGEN> WRITE CURRENT SYSGEN> EXIT $ @SYS$SYSTEM:SHUTDOWN