java.lang.ClassCastException: This exception has no message.

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This exception has no message.
java.lang.ClassCastException:
at com.solarmetric.kodo.impl.jdbc.ormapping.OracleBlobMapping.update(OracleBlobMapping.java:100)
at com.solarmetric.kodo.impl.jdbc.ormapping.OracleBlobMapping.insert(OracleBlobMapping.java:73)
at com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping.insert(ClassMapping.java:437)
at com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:530)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.flushInternal(PersistenceManagerImpl.java:697)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:422)
at com.iits.sdb.app.facade.MaintainProducerRequestFacade.addProducerRequest(MaintainProducerRequestFacade.java:99)
at com.iits.sdb.app.delegate.MaintainProducerRequestDelegate.addProducerRequest(MaintainProducerRequestDelegate.java:89)
at com.iits.ejb.RequestProcessBean.persistRequest(RequestProcessBean.java:333)
at com.iits.ejb.RequestProcessBean.prepareAddInitialAppointment(RequestProcessBean.java:125)
at com.iits.ejb.RequestProcessEjb_pfomyb_EOImpl.prepareAddInitialAppointment(RequestProcessEjb_pfomyb_EOImpl.java:150)
at com.iits.ejb.RequestProcessEjb_pfomyb_EOImpl_WLSkel.invoke(Unknown Source)
at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:466)
at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:108)
at weblogic.rmi.internal.BasicServerRef$1.run(BasicServerRef.java:409)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:353)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:144)
at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:404)
at weblogic.rmi.internal.BasicExecuteRequest.execute(BasicExecuteRequest.java:30)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)

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