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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 org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:523)	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 weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)	at com.nokia.b2t.dna.infrastructure.filters.StrutsMappingFilter.doFilter(StrutsMappingFilter.java:91)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)	at com.nokia.b2t.dna.infrastructure.filters.UserFilter.doFilter(UserFilter.java:69)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)	at com.nokia.b2t.dna.infrastructure.filters.EncodingFilter.doFilter(EncodingFilter.java:78)	at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:27)	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.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2359)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)