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      <title>Automatic Cleanup Operations</title>
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      <div class="title_topic3" id="xps10_pagetitle">Automatic Cleanup Operations</div>
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      <p class="para_topic">When you run <b class="uiTerm">Part Cleanup</b>, the software also automatically runs the following operations:
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            <p class="para_item">Combines extra history objects into one history object. This procedure cycles through all history objects in the work part. If more than one history object is found, the information is extracted from the second and subsequent history objects, and inserted into the first history object. The second and subsequent history objects are then deleted.</p>
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            <p class="para_item">Deletes B-curves that are found to be with invalid data.</p>
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