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

    Indicates that the name specified as the command parameter is a
    module name and not a routine name. You need to use /MODULE only
    if you specify a module name as the command parameter and that
    module name is the same as the name of a routine.