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

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java.lang.NullPointerException:
at com.solarmetric.kodo.impl.jdbc.SQLExecutionManagerImpl.close(SQLExecutionManagerImpl.java:977)
at com.solarmetric.kodo.impl.jdbc.ormapping.OracleBlobMapping.update(OracleBlobMapping.java:89)
at com.solarmetric.kodo.impl.jdbc.ormapping.LobMapping.insert(LobMapping..java:120)
at com.solarmetric.kodo.impl.jdbc.ormapping.ClassMapping.insert(ClassMapping.java:491)
at com.solarmetric.kodo.impl.jdbc.runtime.JDBCStoreManager.flush(JDBCStoreManager.java:403)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.flush(PersistenceManagerImpl.java:575)
at com.solarmetric.kodo.runtime.PersistenceManagerImpl.commit(PersistenceManagerImpl.java:438)
at com.nokia.b2t.dna.persistence.PersistenceAccess.accessPersistence(PersistenceAccess.java:139)
at com.nokia.b2t.dna.persistence.PersistenceAccess.accessPersistence(PersistenceAccess.java:77)
at com.nokia.b2t.dna.preslayer.actions.NOLActionBase.perform(NOLActionBase.java:153)
at org.apache.struts.action.Action.execute(Action.java:415)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:465)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1422)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:262)
at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:21)
at com.nokia.b2t.dna.infrastructure.filters.StrutsMappingFilter.doFilter(StrutsMappingFilter.java:91)
at com.nokia.b2t.dna.infrastructure.filters.UserFilter.doFilter(UserFilter.java:69)
at com.nokia.b2t.dna.infrastructure.filters.EncodingFilter.doFilter(EncodingFilter.java:78)
at com.nokia.b2t.dna.infrastructure.filters.ExceptionLoggingFilter.doFilter(ExceptionLoggingFilter.java:34)
at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2643)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

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