method getClassLoadNotify() not found

[Tom L.]

"On Solaris, when startiong the Weblogic 510 server, I received the following error message:The WebLogic Server did not start up properly.Exception raised: java.lang.reflect.InvocationTargetExceptionjava.lang.reflect.InvocationTargetException: java.lang.NoSuchMethodError: weblogic.boot.ServerClassLoader: method getClassLoadNotify()Lweblogic/boot/ClassLoadNotify; not found at weblogic.utils.classloaders.GenericClassLoader.<init>(GenericClassLoader.java:142) at weblogic.utils.classloaders.GenericClassLoader.<init>(GenericClassLoader.java:113) at weblogic.utils.classloaders.GenericClassLoader.<init>(GenericClassLoader.java:105) at weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader.<init>(RecursiveReloadOnModifyClassLoader.java:53) at weblogic.utils.classloaders.RecursiveReloadOnModifyClassLoader$SingleSlave.<init>(RecursiveReloadOnModifyClassLoader.java:149) at weblogic.servlet.internal.ServletContextImpl.setClassLoader(ServletContextImpl.java:1571) at weblogic.servlet.internal.ServletContextImpl.<init>(ServletContextImpl.java:539) at weblogic.t3.srvr.HttpServer.initServletContexts(HttpServer.java:523) at weblogic.t3.srvr.HttpServer.start(HttpServer.java:418) at weblogic.t3.srvr.T3Srvr.start(T3Srvr.java:1312) at weblogic.t3.srvr.T3Srvr.main(T3Srvr.java:827) at java.lang.reflect.Method.invoke(Native Method) at weblogic.Server.startServerDynamically(Server.java:99) at weblogic.Server.main(Server.java:65) at weblogic.Server.main(Server.java:55)java.lang.NoSuchMethodError: weblogic.boot.ServerClassLoader: method getClassLoadNotify()Lweblogic/boot/ClassLoadNotify; not found at weblogic.utils.classloaders.GenericClassLoader.<init>(GenericClassLoader.java:142) at weblogic.utils.classloaders.GenericClassLoader.<init>(Generic