Thanks for the advice. I exported the custom urls from the old site and attempted to import them into the new but they all gave error messages like this one:
Error importing line: INSERT INTO `oct1_sefurls` (cpt, sefurl, origurl, Itemid, metadesc, metakey, metatitle, metalang, metarobots, metagoogle, metacustom, canonicallink, dateadd, priority, trace, enabled, locked, sef, sm_indexed, sm_date, sm_frequency, sm_priority, trashed) VALUES ('159052', 'index2.php', 'index.php', '', '', '', '', '', '', '', '', '', '2009-01-28', '0', '', '1', '0', '1', '0', '0000-00-00', 'weekly', '0.5', '0');
Old system was running 3.8.2
New system is on 4.1.1
Any ideas or is there some export setting that I might have set incorrectly?