Hi. I've tried to upgrad my xwiki within versions mentioned in subject. I've set xwiki.store.hibernate.updateschema=1 in xwiki.cfg and... upgrade (probably) failed. Xwiki seems to work as before, but there is an error in catalina.out; I suppose it has something to do with schema change and I suppose I will have problems in the future if I ignore it now, right? Do you have any ideas what could be wrong? This is the error message. INFO: Server startup in 4316 ms 11:04:00,629 WARN TP-Processor3 RequestUtils:createActionForm:177 - No FormBeanConfig found under 'view' 11:04:02,159 WARN TP-Processor3 https://xwiki.biuro.contium.pl/xwiki/bin/view/Main/WebHome Configurator:configure:126 - No configuration fou nd. Configuring ehcache from ehcache-failsafe.xml found in the classpath: jar:file:/var/www/xwiki-0.9.840/WEB-INF/lib/ehcache-1.1.jar!/ehcach e-failsafe.xml 11:04:04,292 ERROR TP-Processor3 https://xwiki.biuro.contium.pl/xwiki/bin/view/Main/WebHome XWikiHibernateStore:updateSchema:177 - Schema upd ate for wiki xwiki java.lang.IllegalArgumentException: Illegal pattern character 't' at java.text.SimpleDateFormat.compile(SimpleDateFormat.java:678) at java.text.SimpleDateFormat.initialize(SimpleDateFormat.java:497) at java.text.SimpleDateFormat.<init>(SimpleDateFormat.java:462) at com.xpn.xwiki.XWiki.formatDate(XWiki.java:2780) at com.xpn.xwiki.api.XWiki.formatDate(XWiki.java:646) at gjdk.com.xpn.xwiki.api.XWiki_GroovyReflector.invoke(XWiki_GroovyReflector.java) at groovy.lang.MetaMethod.invoke(MetaMethod.java:110) at groovy.lang.MetaClass.doMethodInvoke(MetaClass.java:1395) at groovy.lang.MetaClass.invokeMethod(MetaClass.java:318) at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:143) at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:104) at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.invokeMethod(ScriptBytecodeAdapter.java:84) at Script1.run(Script1.groovy:70) at com.xpn.xwiki.render.groovy.GroovyTemplateEngine$1.writeTo(GroovyTemplateEngine.java:255) at com.xpn.xwiki.render.groovy.GroovyTemplateEngine$1.toString(GroovyTemplateEngine.java:268) at com.xpn.xwiki.render.groovy.XWikiGroovyRenderer.evaluate(XWikiGroovyRenderer.java:94) at com.xpn.xwiki.render.groovy.XWikiGroovyRenderer.render(XWikiGroovyRenderer.java:128) at com.xpn.xwiki.render.XWikiRenderingEngine.renderText(XWikiRenderingEngine.java:116) at com.xpn.xwiki.render.XWikiRenderingEngine.renderText(XWikiRenderingEngine.java:93) at com.xpn.xwiki.render.XWikiRenderingEngine.renderDocument(XWikiRenderingEngine.java:85) at com.xpn.xwiki.doc.XWikiDocument.getRenderedContent(XWikiDocument.java:220) at com.xpn.xwiki.api.Document.getRenderedContent(Document.java:151) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:267) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:197) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:175) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:220) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:55) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:89) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:230) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:223) at com.xpn.xwiki.render.XWikiVelocityRenderer.evaluate(XWikiVelocityRenderer.java:125) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:806) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:87) -- "First they ignore you. Then they laugh at you. Then they fight you. Then you win." - Mohandas Gandhi.