NCL uses the default file name SYS$LOGIN:NCL$INIT.COM unless you have defined an alternative file use the NCL$INIT logical. To use NCL$NODEA_INIT.COM as an initialization file, use the following DCL define command: $ define ncl$init ncl$nodea_init.com When NCL starts up, it will check for the file NCL$NODEA_INIT.COM, and if it exists, will execute the ncl commands within it.