java.lang.NullPointerException
	at sig.utils.DataAccessObject.getBlobToFile(DataAccessObject.java:100)
	at sig.servlets.Upload.DOWNLOAD(Upload.java:360)
	at sig.servlets.Upload.doCommand(Upload.java:57)
	at sig.ServletBase.doPost(ServletBase.java:60)
	at sig.ServletBase.doGet(ServletBase.java:39)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
	at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
	at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
	at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:247)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3679)
	at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
	at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
	at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
	at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
	at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
	at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
	at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
	at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
	at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1686)
	at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1646)
	at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
	at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
	at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
	at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
	at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
	at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
	at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
	at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)