update on this: i also tried manipulating the timestamps in the dataimport.properties file to advance the date so that no records could be older than last_index_time
example: #Mon May 14 12:42:49 CDT 2012 core1-model.last_index_time=2012-05-15 14\:38\:55 last_index_time=2012-05-15 14\:38\:55 ~ this leads me to believe that date comparisons are not being done correctly or have not been configured correctly. so what does something need to be configured for the date comparison to work? example from wiki: OR last_modified > '${*dataimporter.last_index_time*}'"> -- View this message in context: http://lucene.472066.n3.nabble.com/not-getting-expected-results-when-doing-a-delta-import-via-full-import-tp3983711p3983715.html Sent from the Solr - User mailing list archive at Nabble.com.