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RMI serialVersionUID problem JRE 1.4.2_02

Bartolo Almeda
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I'm having problems I'm trying to send an object using RMI but I get this error "RemoteException occurred in server thread; nested exception is: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is: java.io.InvalidClassException: bartolo.net.Util; Local class not compatible: stream classdesc serialVersionUID=-5390167312941906095 local class serialVersionUID=-3505273448447392111.
I have on one end of my connection IBM JRE 1.3.1_05 and on the other end SUN JRE 1.4.2_02. I think I read somewhere that some changes were made on how to calculates serialUID's between Java 1.3.1 and Java 1.4.0.
Anyone here that know something about this, a link to article or something. Thanks.....
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