My doctype has a attribute related other nodes via mntp, if the related node has been deleted, my xslt does not work, here is my code:

<xsl:for-each select=".//nodeId[position() &lt;= 6]">
          <xsl:variable name="RelateNode" select="umbraco.library:GetXmlNodeById(.)" />
          <xsl:choose>
            <xsl:when test="$RelateNode/@nodeName !=''">
              <li>
                  <span>
                    <xsl:value-of select="$RelateNode/@nodeName"/>
                  </span>
              </li>
            </xsl:when>
          </xsl:choose>
</xsl:for-each>

xml data is:

<MultiNodePicker type="content">
      <nodeId>8535</nodeId>   //this nodeId has been deleted,mntp will hide this item
      <nodeId>9721</nodeId>
      <nodeId>9245</nodeId>
      <nodeId>9246</nodeId>
      <nodeId>9249</nodeId>
      <nodeId>9249</nodeId>
      <nodeId>9250</nodeId>
</MultiNodePicker>

On the properties tab, people can't see <nodeId>8535</nodeId> item, but in the front page, the list does not show <nodeId>9250</nodeId> item, because list number is 6, for-each from <nodeId>8535</nodeId> to <nodeId>9249</nodeId>, so the valid data <nodeId>9250</nodeId> did not show, how to fix that problem?

thanks in advance