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      <title>Non&ndash;fatal errors</title>
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      <div class="title_topic2" id="xps10_pagetitle">Non&ndash;fatal errors</div>
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      </table><br><p class="para_topic">The following error messages are non&ndash;fatal:</p><pre class="indent">Edges Not Shared by Two Surfaces</pre><p class="para_topic">Any edges, which are not shared by two surfaces, are detected. The system highlights all such edges of a surface and displays this error message.</p>
      <p class="para_topic">There are two conditions, which generate this message.</p>
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            <p class="para_item">Two surface edges that should be adjacent are found not to be. Inexact modeling may cause this. You must correct the problem or the output will not comply with the 3D systems interface vertex to vertex rule requirements.</p>
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            <p class="para_item">The edge is part of a support structure and you do not want the edge to be attached to any other edge. In this case, consider the message to be only a warning and continue running the process.</p>
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      </ol><pre class="indent">Normals Cannot Be Automatically Determined</pre><p class="para_topic">When calculating the normals for surfaces, you choose a base surface to establish a correct normal for the model. If your selection of surfaces contains more than one sheet body (a sheet body being a group of surfaces that are all attached to one another), the system highlights all surfaces that are not connected via a chain of surfaces to the base surface and displays this error message. The system then continues the processing and will use the normals stored in the NX database for all offending surfaces. Be aware that the normals for such surfaces may be incorrect.</p>
      <p class="para_topic">Since a chain of surfaces to the base surface does not connect the second body selected, the system highlights it and displays the error message.</p>
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      <p class="para_topic">The figure above displays system interaction when it cannot determine normals.</p>
      <p class="para_topic">If the surfaces highlighted are merely support structures, consider the message to be merely a warning; you can still use the output. Otherwise, make sure all the normals for all highlighted surfaces are correct. Be aware that the <b class="uiTerm">Append</b> option is ideally suited for handling this situation. Run the process once for each body, appending to the previous output file.
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