Hi, I have just upgraded our XWiki 3.1 to the current 3.5 version. When trying to import into the main wiki the default pages XAR (xwiki-enterprise-ui-all-3.5.xar - from which I had removed the appropriate pages and updated the package.xml) from the Administration: Import page, I chose the file and hit upload and nothing happens. I have tried a number of times and the result is the same. Trying to find out what is wrong I looked at the tomcat logs and My catalina.out file is full of hundreds of errors and warnings similar to the following: Has anyone any idea what is going on or what I might try next?? ================================================================================================================================== … 2012-04-12 14:44:25,836 [http://<my server name>/bin/import/XWiki/XWikiPreferences?editor=globaladmin&section=Import] WARN c.x.x.w.XWikiMessageTool - The document [MindMap.Translations] is listed as an internationalization document bundle but it does not exist. … 2012-04-12 14:44:26,462 [Lucene Index Rebuilder] WARN c.x.x.w.XWikiMessageTool - The document [MindMap.Translations] is listed as an internationalization document bundle but it does not exist. … [http://<my server name>/favicon.ico] WARN c.x.x.w.XWikiMessageTool - The document [MindMap.Translations] is listed as an internationalization document bundle but it does not exist. … 2012-04-12 14:44:30,794 [New I/O client worker #229-1] WARN h.c.p.n.NettyAsyncHttpProvider - Unexpected error on close java.lang.IllegalStateException: An Executor cannot be shut down from the thread acquired from itself. Please make sure you are not calling releaseExternalResources() from an I/O worker thread. … 2012-04-12 14:45:05,762 [http://<my server name>/xwiki/bin/import/XWiki/Import?editor=globaladmin&section=Import] ERROR o.i.j.JmxUtil - ISPN000034: There's already an cache manager instance registered under 'org.infinispan' JMX domain. If you want to allow multiple instances configured with same JMX domain enable 'allowDuplicateDomains' attribute in 'globalJmxStatistics' config element … 2012-04-12 14:45:05,768 [http://<my server name>/xwiki/bin/import/XWiki/Import?editor=globaladmin&section=Import] ERROR c.x.x.w.XWikiAction - Uncaught exception during XWiki initialisation: com.xpn.xwiki.XWikiException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Failed to get cache factory component … com.xpn.xwiki.XWikiException: Error number 3202 in 3: Exception while reading document [name = [XWikiPreferences], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [justicepump], type = [WIKI], parent = [null]]]] Wrapped Exception: Error number 3202 in 3: Exception while reading document [name = [XWikiGlobalRights], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [justicepump], type = [WIKI], parent = [null]]]] Wrapped Exception: a different object with the same identifier value was already associated with the session: [com.xpn.xwiki.doc.XWikiDocument#981637980] ... 2012-04-12 15:46:25,496 [http://<my server name>/bin/view/Main/] WARN o.i.m.DefaultCacheManager - ISPN000156: You are not starting all your caches at the same time. This can lead to problems as asymmetric clusters are not supported, see ISPN-658. We recommend using EmbeddedCacheManager.startCaches() to start all your caches upfront. … 2012-04-12 15:47:07,816 [Lucene Index Updater] WARN c.x.x.p.l.AttachmentData - error getting content of attachment [cat2.jpg] for document [name = [LightboxMacro], type = [DOCUMENT], parent = [name = [XWiki], type = [SPACE], parent = [name = [xwiki], type = [WIKI], parent = [null]]]] org.apache.tika.exception.TikaException: Can't read JPEG metadata ... ================================================================================================================================== Has anyone any idea what is going on or what I might try next?? Thanks for any insight you might have, Tim