NullPointerException

[laxmichandu2004]

I am using front end flex and back end java & /Jboss server .I have implemented in my project 3rd party library for spelling checking,throwing the below NullPointerException.

14:50:46,890 INFO [STDOUT] 09/09 14:50:46 ERROR java.lang.NullPointerException
at flex.webtier.server.j2ee.BaseCompileFilter.getDepe ndenciesFromCompilationUnits(BaseCompileFilter.jav a:215)
at flex.webtier.server.j2ee.IncrementalCompileFilter. compileMxml(IncrementalCompileFilter.java:114)
at flex.webtier.server.j2ee.BaseCompileFilter.mxmlToS wf(BaseCompileFilter.java:322)
at flex.webtier.server.j2ee.BaseCompileFilter.invoke( BaseCompileFilter.java:60)
at flex.webtier.server.j2ee.RecompileFilter.invoke(Re compileFilter.java:37)
at flex.webtier.server.j2ee.PathExistsFilter.invoke(P athExistsFilter.java:42)
at flex.webtier.server.j2ee.MxmlServlet.doGet(MxmlSer vlet.java:163)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:810)
at flex.bootstrap.BootstrapServlet.service(BootstrapS ervlet.java:114)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.ApplicationDispatcher.inv oke(ApplicationDispatcher.java:672)
at org.apache.catalina.core.ApplicationDispatcher.pro cessRequest(ApplicationDispatcher.java:463)
at org.apache.catalina.core.ApplicationDispatcher.doF orward(ApplicationDispatcher.java:398)
at org.apache.catalina.core.ApplicationDispatcher.for ward(ApplicationDispatcher.java:301)
at com.moveo.eventhandler.EventHandlerServlet.handleI ndexFlexHandler(EventHandlerServlet.java:188)
at com.moveo.eventhandler.EventHandlerServlet.handleE vent(EventHandlerServlet.java:149)
at com.moveo.eventhandler.EventHandlerServlet.execute Request(EventHandlerServlet.java:114)
at com.moveo.eventhandler.EventHandlerServlet.doPost( EventHandlerServlet.java:75)
at com.moveo.eventhandler.EventHandlerServlet.doGet(E ventHandlerServlet.java:64)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:810)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:173)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doF ilter(ReplyHeaderFilter.java:81)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:202)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:178)
at org.jboss.web.tomcat.security.CustomPrincipalValve .invoke(CustomPrincipalValve.java:39)
at org.jboss.web.tomcat.security.SecurityAssociationV alve.invoke(SecurityAssociationValve.java:153)
at org.jboss.web.tomcat.security.JaccContextValve.inv oke(JaccContextValve.java:59)
at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11Conn ectionHandler.processConnection(Http11Protocol.jav a:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.process Socket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.MasterSlaveWorkerThread .run(MasterSlaveWorkerThread.java:112)
at java.lang.Thread.run(Thread.java:619)

Thanks in advance..