/sys$common/syshlp/DBG$HELP.HLB
DEBUG, CANCEL, BREAK, Parameters

 *Conan The Librarian

 address-expression

    Specifies a breakpoint to be canceled. Do not use the asterisk
    (*)  wildcard character. Instead, use the /ALL qualifier. Do not
    specify an address expression when using any qualifiers except
    /EVENT, /PREDEFINED, or /USER.
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