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This exception has no message.
java.lang.NullPointerException: 	at com.iplanet.am.util.AdminUtils.(AdminUtils.java:59)	at com.sun.identity.agents.realm.AmRealm.initializeAmRealm(Unknown Source)	at com.sun.identity.agents.realm.AmRealm.(Unknown Source)	at com.sun.identity.agents.realm.AmRealmManager.(Unknown Source)	at com.sun.identity.agents.realm.AmRealmManager.(Unknown Source)	at com.sun.identity.agents.weblogic.AmAuthProvider.getRealmInstance(Unknown Source)	at com.sun.identity.agents.weblogic.AmAuthProvider.initialize(Unknown Source)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.createSecurityProvider(SecurityServiceManagerDelegateImpl.java:242)	at weblogic.security.service.SecurityServiceManager.createSecurityProvider(SecurityServiceManager.java:957)	at weblogic.security.service.PrincipalAuthenticator.initialize(PrincipalAuthenticator.java:152)	at weblogic.security.service.PrincipalAuthenticator.(PrincipalAuthenticator.java:262)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.doATN(SecurityServiceManagerDelegateImpl.java:581)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.initializeRealm(SecurityServiceManagerDelegateImpl.java:420)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.loadRealm(SecurityServiceManagerDelegateImpl.java:700)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.initializeRealms(SecurityServiceManagerDelegateImpl.java:733)	at weblogic.security.service.SecurityServiceManagerDelegateImpl.initialize(SecurityServiceManagerDelegateImpl.java:876)	at weblogic.security.service.SecurityServiceManager.initialize(SecurityServiceManager.java:734)	at weblogic.t3.srvr.T3Srvr.initializeHere(T3Srvr.java:822)	at weblogic.t3.srvr.T3Srvr.initialize(T3Srvr.java:670)	at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:344)	at weblogic.Server.main(Server.java:32)