Alfresco Share display vnd.ms-outlook

ERROR [org.alfresco.repo.web.scripts.RepositoryContainer][http-apr-8080-exec-10] Server error (07040098)
org.springframework.extensions.webscripts.WebScriptException: 07040001 Wrapped Exception (with status template): 07040097 Failed to execute script 'classpath*:alfresco/templates/webscripts/org/alfresco/repository/thumbnail/thumbnail.get.js': 07040096 Content conversion failed: 
   reader: ContentAccessor[ contentUrl=store://2015/2/18/8/56/4625f597-31cf-4142-af95-88266ff8810f.bin, mimetype=application/vnd.ms-outlook, size=346624, encoding=UTF-8, locale=de_DE]
   writer: ContentAccessor[ contentUrl=store://2015/8/4/15/42/07049116-cbca-468e-89e1-b33095422031.bin, mimetype=application/pdf, size=0, encoding=UTF-8, locale=de_DE]
   options:{use=pdf, contentReaderNodeRef=workspace://SpacesStore/8dffaa76-ee8d-420f-89e9-8f48fdbb47d7, sourceContentProperty=null, contentWriterNodeRef=workspace://SpacesStore/47dc7be2-85c9-41c1-92e6-18f9bdbbeadd, targetContentProperty=null, includeEmbedded=false}
   limits:{timeoutMs=120000}
	at org.springframework.extensions.webscripts.AbstractWebScript.createStatusException(AbstractWebScript.java:1127)
	at org.alfresco.repo.web.scripts.content.StreamContent.execute(StreamContent.java:195)
	at org.alfresco.repo.web.scripts.RepositoryContainer$3.execute(RepositoryContainer.java:482)
	at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:457)
	at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecute(RepositoryContainer.java:551)
	at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecuteAs(RepositoryContainer.java:619)
	at org.alfresco.repo.web.scripts.RepositoryContainer.executeScriptInternal(RepositoryContainer.java:399)
	at org.alfresco.repo.web.scripts.RepositoryContainer.executeScript(RepositoryContainer.java:280)
	at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:378)
	at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:209)
	at org.springframework.extensions.webscripts.servlet.WebScriptServlet.service(WebScriptServlet.java:132)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.alfresco.web.app.servlet.GlobalLocalizationFilter.doFilter(GlobalLocalizationFilter.java:61)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2466)
	at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2455)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)
Caused by: org.alfresco.scripts.ScriptException: 07040097 Failed to execute script