I have a server program (which is the ejb client) that calls about 5 different stateless ejbs in sequences. In order to stress test this program, I created a loop in the ejb client with the result that the 5 ejbs were called in sequence about twenty times. The first seven runs went fine. In the eigth run I got the following exception: Batch Import: Cannot load wilbow.xls java.rmi.UnmarshalException in batchserver.ImportProcessor.process(): Error unmarshaling return; nested exception is: java.io.InvalidClassException: org.xml.sax.SAXException; Local class not compatible: stream classdesc serialVersionUID=-1073947592240463613 local class serialVersionUID=583241635256073760 The subsequent, remaining 12 runs executed normally. Has anyone encountered this problem? Thomas Kirsch -- -------------------------------------------------------------- To subscribe: [EMAIL PROTECTED] To unsubscribe: [EMAIL PROTECTED] List Help?: [EMAIL PROTECTED]