Hi! I have an external jar-file (xercesImpl-2.9.1.jar) that I have imported and referenced in my Android-project in Eclipse. It is now visible in "Referenced libraries". In Eclipse it finds classes from this jar and there is no error anywhere. But when I debug the code it stops on the first use of an external jar class with the following error: Source not found The JAR of this class file belongs to container 'Android 1.5' which does not allow modifications to source attachments on its entries The line on which it stops lookes like this: DOMParser parser = new DOMParser(); What is going on? How should I add an external JAR?