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

    The CANCEL SCOPE command cancels the current scope search list
    established by a previous SET SCOPE command and restores the
    default scope search list, namely 0,1,2, . . . ,n, where n is the
    number of calls in the call stack.

    The default scope search list specifies that, for a symbol
    without a path-name prefix, a symbol lookup such as EXAMINE X
    first looks for X in the routine that is currently executing
    (scope 0); if no X is visible there, the debugger looks in the
    caller of that routine (scope 1), and so on down the call stack;
    if X is not found in scope n, the debugger searches the rest of
    the run-time symbol table (RST), then searches the global symbol
    table (GST), if necessary.

    Related commands:

       (SET,SHOW) SCOPE