Hola

Tengo un problema con mis pruebas.
Necesito grabar y probar un proceso de registro de expedientes, pero cuando llego a la parte de grabar los datos me sale un error.
Copio detalle del error que se presenta:

java.lang.NullPointerException
   at IpasWeb.Mark.Edit.MarkEditControllerImpl.updateEntityFromPage(MarkEditControllerImpl.java:4132)
   at IpasWeb.Mark.Edit.EditTrademarkSaveAllChanges._updateCurrentMarkFromPage(EditTrademarkSaveAllChanges.java:216)
   at IpasWeb.Mark.Edit.EditTrademarkSaveAllChanges.execute(EditTrademarkSaveAllChanges.java:121)
   at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
   at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
   at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
   at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
   at org.andromda.presentation.bpm4struts.ActionServlet.doPost(ActionServlet.java:48)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:688)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:770)
   at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
   at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:206)
   at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:179)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
   at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter.java:125)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
   at IpasWeb.ApplContext.LoginFilter.doFilter(LoginFilter.java:57)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
   at webcontrol.CharsetFilter.doFilter(CharsetFilter.java:22)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256)
   at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217)
   at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279)
   at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
   at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
   at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
   at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
   at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
   at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
   at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
   at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
   at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
   at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
   at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
   at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
   at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
   at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
   at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
   at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
   at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
   at No tienes permitido ver enlaces. Registrate o Entra a tu cuenta(SelectionKeyContextTask.java:59)
   at No tienes permitido ver enlaces. Registrate o Entra a tu cuenta(ContextTask.java:71)
   at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
   at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
   at No tienes permitido ver enlaces. Registrate o Entra a tu cuenta(Thread.java:745)