Hi , thank you for reading my post.I really stocked with this error I have a very odd problem here. I create a database table in Mysql Then i used Netbeans 4.1 to generate a CMP from the table (before this i register the driver and database innetbeans Databses node in runtime window), i did not change any setting My table has 3 field which one of them is : autoIncrement Integer + Primary ky
then i try to run the enterprise application . I pressed lovely f11 and it Stoped with error .
here is the error messege : Deploying application in domain failed; Fatal Error from EJB Compiler -- JDO74046: JDOCodeGenerator: Caught a MappingConversionException loading or creating mapping model for application 'ejblearn' module 'ejblearn-EJBModule': JDO71030: There is no column in table learn which can be used to support the servers implementation of unknown key classes. ; requested operation cannot be completed
The window has the same messege (I should notice that deployment progress monitor shows the same message in red Color)