i I migrate to xwiki 1.1M3 from 1.1M2 but my access right doesn't work anymore for Space rihts. By example: In global rights: XwikiGuest allow to Edit-register and view In SandBox space XwikiGuest allot to Edit-register, view, DELETE and programming I delete and re-apply XwikiGuest rights but XWikiGuest can't delete a SandBox space. All my spaces specific access rights doesn't work anymore! Any helps? thxs PS: I try to migrate down to 1.1M2 but it doesn't work. My TomCat5.5 server return: -------------------- Etat HTTP 500 - type Rapport d'exception message description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête. exception javax.servlet.ServletException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3201 in 3: Exception while saving document XWiki.XWikiPreferences Wrapped Exception: Error number 3211 in 3: Exception while updating archive XWiki.XWikiPreferences Wrapped Exception: Error number 3212 in 3: Exception while loading archive 104 408 758 Wrapped Exception: null org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:535) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:433) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) javax.servlet.http.HttpServlet.service(HttpServlet.java:689) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118) cause mère com.xpn.xwiki.XWikiException: Error number 3 in 0: Could not initialize main XWiki context Wrapped Exception: Error number 3201 in 3: Exception while saving document XWiki.XWikiPreferences Wrapped Exception: Error number 3211 in 3: Exception while updating archive XWiki.XWikiPreferences Wrapped Exception: Error number 3212 in 3: Exception while loading archive 104 408 758 Wrapped Exception: null com.xpn.xwiki.XWiki.getMainXWiki(XWiki.java:292) com.xpn.xwiki.XWiki.getXWiki(XWiki.java:384) com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:96) org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431) org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414) javax.servlet.http.HttpServlet.service(HttpServlet.java:689) javax.servlet.http.HttpServlet.service(HttpServlet.java:802) com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:118) note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/5.5.7. ------------------------- Pascal