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

 cannot set watchpoints on variant records

    Facility: DEBUG, VMS Debugger

    Explanation: The user has requested that a watchpoint be set on a
    variant record. This operation is not currently supported

    User Action: No user action required