Local class not compatible

[Sachin Pandey]

I am storing a serialized version of a class in the database.I ran the upload on a machine A, backed up the database and restored the database on another machine B. On machine B when I try to retrieve the object back I am getting a SQLException saying that the local class is not compatible showing two different serialVersionUID's.There is no difference in the class source between machine A and machine B. I haven't declared the private serialVersionUID instance variable for the class (which I should). What's confusing me is if the class hasn't changed then why am I getting this "Local class not compatible" exceptions. I am retrieving the object from an Entity Bean the sql type is set as OID and the jdbc type as a JAVA_OBJECT. In what cases can I get this exception apart from the class source changing?    Cheers Sachin Pandey NUIX Pty Ltd Level 8, 143 York Street, Sydney 2000 Phone: (02) 92839010 Fax: (02) 92839020   Disclaimer: This message is intended only for the named recipient. If you are not the intended recipient you are notified that disclosing,copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.