Cant use whitespaces in expression duration("P1Y") -------------------------------------------------- Key: DROOLS-4082 URL: https://issues.jboss.org/browse/DROOLS-4082 Project: Drools Issue Type: Bug Affects Versions: 7.23.0.Final Reporter: Yevgeniy Fomin Assignee: Daniel José dos Santos Priority: Major Labels: drools-tools Fix For: 7.23.0.Final If you will try use duration with white spaces it causing crashing of format in Enumeration