[Koha] rebuild index

thanks indranil i successful installed version 3.18 in ubuntu 12.04 ,when i ran sudo -u koha misc/migration_tools/rebuild_zebra.pl -b -r -v without data in database it work well ,but i import data when i ran sudo -u koha misc/migration_tools/rebuild_zebra.pl -b -r -v it will give me this error : [warn] No such record type: dom./etc/koha/zebradb/biblios/etc/dom-config-marc.xml how to solve the error help please -- regina