Parameter

 

file-spec

   Names the file specification of an image to be installed as
   a known image. The file specification must name an existing
   executable or shareable image, which must have been linked with
   the /NOTRACEBACK qualifier. If you omit the device and directory
   specification, the default SYS$SYSTEM is used. The default file
   type is .EXE.

   The highest existing version of the file is used by default.
   However, you can specify another version of the file as the known
   version of the image. Even if other versions of the file exist,
   the version that you specify will be the version that satisfies
   all known file lookups for the image.