+<H2><A NAME="ss2.6">2.6 I updated my Linux distribution and now Spider cannot read the users file or the dupefile, what is the problem?</A>
+</H2>
+
+<P>Almost certainly this is a change in the db format of perl. Follow these
+few steps to correct the problem.
+<P>
+<UL>
+<LI>stop the cluster (disable any autostart in inittab)</LI>
+<LI>cd /spider/data</LI>
+<LI>issue the command perl user_asc</LI>
+<LI>restart the cluster</LI>
+</UL>
+<P>That should solve the problem.
+<P>
+<H2><A NAME="ss2.7">2.7 Since I last updated I seem to be getting duplicate spots appearing.</A>
+</H2>
+
+<P>What has probably happened is that the dupefile has got corrupted in
+some way. Simply delete the /spider/data/dupefile and restart the
+cluster. It may take a little time to become fully functional but
+should solve your problem.
+<P>