Hi, I have some rules written in a dsl in a data base and I need to validate those rule so I used a PackageBuilder instance and a PackageBuilderErrors but it's a bit akward to manage with the subclasses of DroolsError. What I need is to get the line number of the error in my drl file (the DroolsError ). How can I proceed ? thanks This is what I tried to do : PackageBuilderErrors pkgBuilderErrors = builder.getErrors(); DroolsError[] droolsErrors = pkgBuilderErrors.getErrors(); List<DroolsError> errorList = new ArrayList<DroolsError>(Arrays.asList(droolsErrors)); for (DroolsError droolsError : errorList) { if (droolsError instanceof ParserError) { ... -- View this message in context: http://www.nabble.com/rule-validation-tf4268341.html#a12147869 Sent from the drools - user mailing list archive at Nabble.com.