MY DROOLS BINARIES VERSIONS: drools-clips-5.4.0.Final.jar drools-compiler-5.4.0.Final.jar drools-core-5.4.0.Final.jar drools-decisiontables-5.4.0.Final.jar droolsjbpm-introduction-docs-5.4.0.Final.jdocbook drools-jsr94-5.4.0.Final.jar drools-persistence-jpa-5.4.0.Final.jar drools-templates-5.4.0.Final.jar drools-verifier-5.4.0.Final.jar BACKGROUND: I'm embedding drools in an application. To test the error handling, I'm trying to import a type that doesn't exist: import does.not.exist; When I print out the error messages from KnowledgeBuilder.getErrorMessages() they all look similar to this: Error importing : 'does.not.exist' Rule Compilation error : [Rule name='Telnet'] defaultpkg/Rule_Telnet_cdef8401dd054fb59abb4e33b76d12f7.java (2:74) : Only a type can be imported. does.not.exist resolves to a package I have looked at section 4 - "Error messages" in the drools expert documentation - http://docs.jboss.org/drools/release/5.4.0.Final/drools-expert-docs/html_... to find a description of error messages. MY QUESTION: There is an error message format described in the drools expert documentation: " 1st Block: This area identifies the error code. 2nd Block: Line and column information. 3rd Block: Some text describing the problem. 4th Block: This is the first context. Usually indicates the rule, function, template or query where the error occurred. This block is not mandatory. 5th Block: Identifies the pattern where the error occurred. This block is not mandatory." Why is my error message not formatted like the documentation describes?