Class COM.odi.IncompatibleClassException

java.lang.Object
   |
   +----java.lang.Throwable
           |
           +----java.lang.Exception
                   |
                   +----java.lang.RuntimeException
                           |
                           +----COM.odi.ObjectStoreException
                                   |
                                   +----COM.odi.SchemaException
                                           |
                                           +----COM.odi.IncompatibleClassException

public final class IncompatibleClassException
extends SchemaException

Thrown when an attempt is made to use a persistent object whose persistent schema does not match its current transient class definition. The following changes can cause this exception to be thrown:

Adding or deleting a persistent instance field.
Changing the type of a persistent instance field.
Changing the order of persistent instance fields.
Adding or deleting hashCode() methods - this affects whether or not the postprocessor adds a persistent hash code state field.
Changing whether a class is abstract.
Adding or removing classes in the inheritance graph, even if they contain no fields.

See Schema Evolution: Modifying Class Definitions of Objects in a Database, in the user guide.