java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at weblogic.common.internal.ProxyClassResolver.resolveProxyClass(ProxyClassResolver.java:55)
at weblogic.rjvm.MsgAbbrevInputStream.resolveProxyClass(MsgAbbrevInputStream.java:368)
at weblogic.common.internal.ChunkedObjectInputStream$NestedObjectInputStream.resolveProxyClass(ChunkedObjectInputStream.java:322)
at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1469)
at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1432)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at weblogic.common.internal.ChunkedObjectInputStream.readObject(ChunkedObjectInputStream.java:120)
at weblogic.rjvm.MsgAbbrevInputStream.readObject(MsgAbbrevInputStream.java:135)
at weblogic.rmi.internal.ObjectIO.readObject(ObjectIO.java:56)
at weblogic.rjvm.ResponseImpl.unmarshalReturn(ResponseImpl.java:164)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:293)
at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:248)
at weblogic.jndi.internal.ServerNamingNode_816_WLStub.lookup(Unknown Source)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:375)
at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:363)
at javax.naming.InitialContext.lookup(InitialContext.java:347)
at ejb.WLEJBClient.main(WLEJBClient.java:23)

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