@Saravanan M To retrieve all the backend Java (JAR) files for an entire Pega application, you can create a Product Rule in Pega Dev Studio. Go to Configure > Application > Distribution > Package > Create Product File, and include the entire application along with rulesets, library rules, and function rules to ensure all Java-based components are captured. Export the Product Rule as a ZIP file, which will contain the required JAR files. If you need specific Java code, navigate to Records > Technical > Library and download any listed JARs or custom code. For direct server access, you can locate the JAR files in the Pega installation directory under /lib or /WEB-INF/lib. This method covers both custom Java functions and external libraries used in your application