Library /sys$common/syshlp/dbg$help.hlb DEBUG, SET, SOURCE, Qualifiers, /MODULE  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /MODULE=module-name

    Specifies the directory search list used only for the designated
    module. You can append one or more of the qualifiers listed above
    to the SET SOURCE/MODULE command.