[Plugin: IndexSpy-WP] RSS Export

During rss export I get the following error:

Feed Created:
<b>Warning</b>: Invalid argument supplied for foreach() in <b>/home/waves8/public_html/wp-content/plugins/indexspy/build_feed.php</b> on line <b>64</b>
http://www.wavesoftech.com/wp-content/plugins/indexspy/my-feeds/wotrssnew.xml