The search index could not be updated. The site is misconfigured. Contact an administrator. SQLSTATE[42000]: Syntax error or access violation: 1064 unknown table 'tiki_main_67e2559f7089d' in delete request
If OpenWiki has the same Wiki syntax as PHP-Wiki then you may be able to use the Wiki import feature. Otherwise you will have to write your own conversion script I am afraid.
