a multi-threaded PDF conversion exception(Conversion service:WatchedFolder)

Hi,     

     I have a multi-threaded conversion exception(Conversion service:WatchedFolder)

     Some can be converted successfully, and some reported the following error

     Exception information is as follows

     ALC-PDG-16004-000: com.adobe.livecycle.generatepdf.client.ConversionException: ALC-PDG-016-004-An      error  was  encountered while processing the Microsoft Word file for PDF generation.
at com.adobe.pdfg.BMCCaller.checkResult(BMCCaller.java:377)
at com.adobe.pdfg.Native2PdfCaller.callNativeBMC(Native2PdfCaller.java:1078)
at com.adobe.pdfg.Native2PdfCaller.createPDF(Native2PdfCaller.java:382)
at com.adobe.pdfg.GeneratePDFImpl.createPDFInternal(GeneratePDFImpl.java:501)
at com.adobe.pdfg.GeneratePDFImpl.createPDFCommon(GeneratePDFImpl.java:280)
at com.adobe.pdfg.GeneratePDFImpl.createPDF(GeneratePDFImpl.java:232)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:45)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
at java.lang.reflect.Method.invoke(Method.java:599)
at com.adobe.idp.dsc.component.impl.DefaultPOJOInvokerImpl.invoke(DefaultPOJOInvokerImpl.jav a:118)
at com.adobe.idp.dsc.interceptor.impl.InvocationInterceptor.intercept(InvocationInterceptor. java:140)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.interceptor.impl.DocumentPassivationInterceptor.intercept(DocumentPassi vationInterceptor.java:53)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor$1.doInTransaction(Transa ctionInterceptor.java:74)
at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionBMTAdapterBean.doBMT(EjbTran sactionBMTAdapterBean.java:197)
at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EJSLocalStatelessEjbTransactionBMTAdapter_ 3af08fdf.doBMT(Unknown Source)
at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvi der.java:95)
at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInt erceptor.java:72)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStra tegyInterceptor.java:55)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateIntercep tor.java:37)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterc eptor.java:188)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48)
at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptor ChainImpl.java:60)
at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:121)
at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:129)
at com.adobe.idp.dsc.provider.impl.base.AbstractMessageReceiver.routeMessage(AbstractMessage Receiver.java:93)
at com.adobe.idp.dsc.provider.impl.vm.VMMessageDispatcher.doSend(VMMessageDispatcher.java:22 5)
at com.adobe.idp.dsc.provider.impl.base.AbstractMessageDispatcher.send(AbstractMessageDispat cher.java:66)
at com.adobe.idp.dsc.clientsdk.ServiceClient.invoke(ServiceClient.java:208)
at com.adobe.idp.jobmanager.execution.workadapter.AbstractExecutableJob.invokeRequest(Abstra ctExecutableJob.java:127)
at com.adobe.idp.jobmanager.execution.workadapter.PersistentExecutableJob.execute(Persistent ExecutableJob.java:60)
at com.adobe.idp.dsc.workmanager.adapter.UnManagedAsynchronousWorkAdapter.run(UnManagedAsync hronousWorkAdapter.java:39)
at com.adobe.idp.dsc.workmanager.adapter.websphere.J2WA_Work.run(J2WA_Work.java:34)
at com.ibm.ws.asynchbeans.J2EEContext$RunProxy.run(J2EEContext.java:268)
at java.security.AccessController.doPrivileged(AccessController.java:202)
at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:768)
at com.ibm.ws.asynchbeans.WorkWithExecutionContextImpl.go(WorkWithExecutionContextImpl.java: 222)
at com.ibm.ws.asynchbeans.ABWorkItemImpl.run(ABWorkItemImpl.java:159)
at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)