[xwiki-users] Error on import

Hi, I'm trying to import a package of documents from xwiki 3.4 to a new xwiki 4.1.3 instance (the automatic database migration failed, so I tried another method). The attachment storage is "file". The file upload is ok, but when I launch the import, I've the message below (full stacktrace at the end of this mail) : 2012/07/17 14:50:34 [http://172.24.1.135:8080/xem/wiki/commungie/import/XWiki/XWikiPreferenc es?section=Import] WARN com.xpn.xwiki.web.XWikiAction - Uncaught exception: Error number 11015 in 11: Exception while importing Wrapped Exception: null com.xpn.xwiki.XWikiException: Error number 11015 in 11: Exception while importing Wrapped Exception: null at com.xpn.xwiki.web.ImportAction.render(ImportAction.java:144) Caused by: java.lang.NullPointerException: null at com.xpn.xwiki.doc.XWikiAttachmentArchive.getVersions(XWikiAttachmentArch ive.java:223) Have you some ideas about this problem ? I try to migrate from 3.4 to 4.x for 3 weeks, so any help would be very welcome. Thank you Best regards, Nicolas The full stack trace : 2012/07/17 14:50:34 [http://172.24.1.135:8080/xem/wiki/commungie/import/XWiki/XWikiPreferenc es?section=Import] WARN com.xpn.xwiki.web.XWikiAction - Uncaught exception: Error number 11015 in 11: Exception while importing Wrapped Exception: null com.xpn.xwiki.XWikiException: Error number 11015 in 11: Exception while importing Wrapped Exception: null at com.xpn.xwiki.web.ImportAction.render(ImportAction.java:144) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:231) [xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:116) [xwiki-platform-legacy-oldcore-4.1.3.jar:na] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestPr ocessor.java:431) [struts-1.2.9.jar:1.2.9] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java: 236) [struts-1.2.9.jar:1.2.9] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) [struts-1.2.9.jar:1.2.9] at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) [struts-1.2.9.jar:1.2.9] at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) [servlet-api.jar:na] at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) [servlet-api.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:269) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:120) [xwiki-platform-legacy-oldcore-4.1.3.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:215) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilt er.java:144) [xwiki-platform-wysiwyg-server-4.1.3.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:215) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java: 66) [xwiki-platform-webdav-server-4.1.3.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:215) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter. doFilter(SavedRequestRestorerFilter.java:208) [xwiki-platform-container-servlet-4.1.3.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:215) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter. doFilter(SetCharacterEncodingFilter.java:111) [xwiki-platform-container-servlet-4.1.3.jar:na] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Applica tionFilterChain.java:215) [catalina.jar:na] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilt erChain.java:188) [catalina.jar:na] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValv e.java:213) [catalina.jar:na] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValv e.java:174) [catalina.jar:na] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java :127) [catalina.jar:na] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java :117) [catalina.jar:na] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve. java:108) [catalina.jar:na] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:1 51) [catalina.jar:na] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:87 4) [tomcat-http.jar:na] at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.proc essConnection(Http11BaseProtocol.java:665) [tomcat-http.jar:na] at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint .java:528) [tomcat-util.jar:5.1] at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollow erWorkerThread.java:81) [tomcat-util.jar:5.1] at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool .java:689) [tomcat-util.jar:5.1] at java.lang.Thread.run(Thread.java:662) [na:1.6.0_29] Caused by: java.lang.NullPointerException: null at com.xpn.xwiki.doc.XWikiAttachmentArchive.getVersions(XWikiAttachmentArch ive.java:223) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at org.xwiki.store.legacy.store.internal.AttachmentArchiveSaveRunnable.<ini t>(AttachmentArchiveSaveRunnable.java:70) ~[xwiki-platform-store-filesystem-attachments-4.1.3.jar:na] at org.xwiki.store.legacy.store.internal.FilesystemAttachmentVersioningStor e.getArchiveSaveRunnable(FilesystemAttachmentVersioningStore.java:209) ~[xwiki-platform-store-filesystem-attachments-4.1.3.jar:na] at org.xwiki.store.legacy.store.internal.FilesystemAttachmentStore$Attachme ntSaveTransactionRunnable.<init>(FilesystemAttachmentStore.java:354) ~[xwiki-platform-store-filesystem-attachments-4.1.3.jar:na] at org.xwiki.store.legacy.store.internal.FilesystemAttachmentStore.getAttac hmentContentSaveRunnable(FilesystemAttachmentStore.java:153) ~[xwiki-platform-store-filesystem-attachments-4.1.3.jar:na] at org.xwiki.store.legacy.store.internal.FilesystemAttachmentStore.saveAtta chmentContent(FilesystemAttachmentStore.java:113) ~[xwiki-platform-store-filesystem-attachments-4.1.3.jar:na] at com.xpn.xwiki.doc.XWikiDocument.saveAttachmentContent(XWikiDocument.java :4279) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.doc.XWikiDocument.saveAllAttachments(XWikiDocument.java:42 36) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.plugin.packaging.Package.installDocument(Package.java:760) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.plugin.packaging.Package.install(Package.java:616) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.plugin.packaging.PackageAPI.install(PackageAPI.java:316) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] at com.xpn.xwiki.web.ImportAction.render(ImportAction.java:132) ~[xwiki-platform-legacy-oldcore-4.1.3.jar:na] ... 37 common frames omitted