Free form expression constraints: unexpected execution result; unexpected failure to compile --------------------------------------------------------------------------------------------- Key: JBRULES-3001 URL: https://issues.jboss.org/browse/JBRULES-3001 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.CR1 Reporter: Wolfgang Laun Assignee: Mark Proctor Given public class Customer { int custid; //... } The following rule always fires, for any value of custid. rule "articles of a customer" when $c: Customer( 150 <= custid <= 250 ) returns true then System.out.println( "Customer1 " + $c.getCustid() ); end But the constraint $c: Customer( 100 <= custid ) is refused by the compiler: Unable to build constraint as '100' is invalid : [Rule name='articles of a customer'] -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira