Full Error located in attachment.
Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com.sap.conn.jco.ext.DestinationDataProvider
at java.lang.ClassLoader.defineClass(ClassLoader.java:345)
Release : 11.3.6
Component : CA Workload Automation AE (AutoSys)
Reinstalling SAP JCO3 resolved the issue.
SAP JCO3 was removed accidently.