Michael Wohlfart [http://community.jboss.org/people/mwohlf] replied to the discussion "Empty string process variable on Oracle 9i" To view the discussion, visit: http://community.jboss.org/message/539372#539372 -------------------------------------------------------------- it's an Oracle feature to convert empty Strings to null see: http://www.thunderguy.com/semicolon/2003/04/26/oracle-empty-string-null/ http://www.thunderguy.com/semicolon/2003/04/26/oracle-empty-string-null/ best option is to use a  hibernate UserType for Strings to somehow escape emtpy Strings for jBPM -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/539372#539372] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]