W8004 'identifier' is assigned a value that is never used (C++)

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(Command-line option to suppress warning: -w-aus)

The variable appears in an assignment, but is never used anywhere else in the function just ending.

The warning is indicated only when the compiler encounters the closing brace.

The #pragma warn -aus switch has function-level granularity. You cannot turn off this warning for individual variables within a function; it is either off or on for the whole function.