Validação de CT-e

Bom dia,

Emito CT-e pelo emissor gratuito do Sebrae, ocorre que não estou conseguindo validar, clico na opção Validar e nada acontece. Isso acontece com apenas um emitente, os demais estou emitindo normalmente. Aparece esse erro:

null
java.lang.NullPointerException
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness.a(ConhecimentoTransporteBusiness.java:800)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness.validar(ConhecimentoTransporteBusiness.java:513)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f.CGLIB$validar$8(<generated>)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f$$FastClassByCGLIB$$882b55bc.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:66)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f.validar(<generated>)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness.validar(ConhecimentoTransporteBusiness.java:921)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f.CGLIB$validar$9(<generated>)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f$$FastClassByCGLIB$$882b55bc.invoke(<generated>)
at net.sf.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:167)
at br.gov.sp.fazenda.dsge.model.dao.util.DSGEDAOInterceptorHelper.intercept(DSGEDAOInterceptorHelper.java:66)
at br.gov.sp.fazenda.dsec.model.business.ConhecimentoTransporteBusiness$$EnhancerByCGLIB$$7f58688f.validar(<generated>)
at br.gov.sp.fazenda.dsec.model.facade.ConhecimentoTransporteFacade.validar(ConhecimentoTransporteFacade.java:169)
at br.gov.sp.fazenda.dsec.controller.PesquisarCteController.a(PesquisarCteController.java:519)
at br.gov.sp.fazenda.dsec.controller.PesquisarCteController.actionPerformed(PesquisarCteController.java:798)
at br.gov.sp.fazenda.dsge.view.util.CursorController$1.actionPerformed(CursorController.java:36)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Alguém consegue me auxiliar?