Upload gcc bbmri xls data : Ontology terms seem to be different from Biobank.category --> correct them . Add in OntologyTerm.name all the category_name, topics_name , materials name and then remove the duplicates : !http://office.microsoft.com/en-us/excel-help/delete-duplicate-rows-from-a-list-in-excel-HA001034626.aspx Error in import : java.util.ArrayList cannot be cast to org.molgenis.bbmri.Biobank