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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<title>optim_doc: XREFvfzero</title>

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<p>The node you are looking for is at <a href="vfzero.html#XREFvfzero">XREFvfzero</a>.</p>
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