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

    Causes the debugger to break when a process does an image exit.
    The debugger gains control and displays its prompt when the
    last image of a one-process or multiprocess program exits. A
    process is terminated when the image has executed the $EXIT
    system service and all of its exit handlers have executed. See
    also the /ACTIVATING qualifier.