[rules-users] Unexpected global error

Hello, I get this exception: Exception in thread "main" java.lang.RuntimeException: Unexpected global [service] That's the global declaration in the drl: global java.util.HashMap service And ther I set teh global in teh Java-class: HashMap<String, AIOObject> service = new HashMap<String, AIOObject>(); workingMemory.setGlobal("service", service); Appreciate your help! Kind Regards Thomas