Folks, Has anyone faced the same issue? My config: Mysql 5.1 Tomcat6 XEM WAR package 4.5.1 installed manually File system storage enabled on installation, so no need to port from database storage. XWikiPreferences max upload size changed to 1Gb (1073741824 bytes). Details of the issue: It doesn't matter if I try to attach on the main wiki on any workspace. The result is the same: The upload progress to around 1Mb. After retring for 1 or 2 times the following error message is displayed: "An error occured while uploading <file>..." Here my xwiki.cfg (without the comments to make it short): xwiki.rendering.syntaxes = xwiki/1.0, xwiki/2.0, xwiki/2.1, xhtml/1.0, html/4.01, plain/1.0, docbook/4.4 xwiki.encoding=UTF-8 xwiki.section.edit=1 xwiki.section.depth=2 xwiki.backlinks=1 xwiki.tags=1 xwiki.store.attachment.hint=file xwiki.store.attachment.versioning.hint=file xwiki.store.attachment.recyclebin.hint=file xwiki.store.cache=0 xwiki.store.migration=0 xwiki.store.migration.databases=all xwiki.virtual=1 xwiki.virtual.redirect=http://127.0.0.1:9080/xwiki/bin/Main/ThisWikiDoesNotExist xwiki.inactiveuser.allowedpages= xwiki.authentication.validationKey=totototototototototototototototo xwiki.authentication.encryptionKey=titititititititititititititititi xwiki.authentication.cookiedomains= xwiki.authentication.logoutpage=(/|/[^/]+/|/wiki/[^/]+/)logout/* xwiki.authentication.unauthorized_code=200 xwiki.editcomment=1 xwiki.editcomment.mandatory=0 xwiki.authentication.ldap.server=127.0.0.1 xwiki.authentication.ldap.port=389 xwiki.authentication.ldap.bind_DN=cn={0},department=USER,department=INFORMATIK,department=1230,o=MP xwiki.authentication.ldap.bind_pass={1} xwiki.authentication.ldap.base_DN= xwiki.authentication.ldap.fields_mapping=last_name=sn,first_name=givenName,email=mail xwiki.authentication.ldap.update_user=1 xwiki.authentication.ldap.trylocal=1 xwiki.defaultskin=colibri xwiki.defaultbaseskin=colibri xwiki.title.compatibility=1 xwiki.plugins=\ com.xpn.xwiki.monitor.api.MonitorPlugin,\ com.xpn.xwiki.plugin.skinx.JsSkinExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.JsSkinFileExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.JsResourceSkinExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.CssSkinExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.CssSkinFileExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.CssResourceSkinExtensionPlugin,\ com.xpn.xwiki.plugin.skinx.LinkExtensionPlugin,\ com.xpn.xwiki.plugin.feed.FeedPlugin,\ com.xpn.xwiki.plugin.google.GooglePlugin,\ com.xpn.xwiki.plugin.mail.MailPlugin,\ com.xpn.xwiki.plugin.packaging.PackagePlugin,\ com.xpn.xwiki.plugin.svg.SVGPlugin,\ com.xpn.xwiki.plugin.charts.ChartingPlugin,\ com.xpn.xwiki.plugin.fileupload.FileUploadPlugin,\ com.xpn.xwiki.plugin.image.ImagePlugin,\ com.xpn.xwiki.plugin.zipexplorer.ZipExplorerPlugin,\ com.xpn.xwiki.plugin.lucene.LucenePlugin,\ com.xpn.xwiki.plugin.diff.DiffPlugin,\ com.xpn.xwiki.plugin.rightsmanager.RightsManagerPlugin,\ com.xpn.xwiki.plugin.jodatime.JodaTimePlugin,\ com.xpn.xwiki.plugin.scheduler.SchedulerPlugin,\ com.xpn.xwiki.plugin.mailsender.MailSenderPlugin,\ com.xpn.xwiki.plugin.activitystream.plugin.ActivityStreamPlugin, \ com.xpn.xwiki.plugin.watchlist.WatchListPlugin, \ com.xpn.xwiki.plugin.tag.TagPlugin xwiki.stats.default=0 xwiki.plugin.image.cache.capacity=30