Hi I try to configure LDAP with my XWiki installation which is virtual. I got an error : java.lang.NullPointerException. I'd like to propose the patch below. -- Xavier MOGHRABI - Consortium ObjectWeb Email : xavier.moghrabi at objectweb.org Phone : +33 4 76 61 52 35 Index: LDAPAuthServiceImpl.java =================================================================== --- LDAPAuthServiceImpl.java (révision 922) +++ LDAPAuthServiceImpl.java (copie de travail) @@ -183,7 +183,7 @@ } catch (Exception e) {} if (context.isVirtual()) { - if (DN==null && DN.length()!=0) { + if (DN==null || DN.length()==0) { // Then we check in the main database String db = context.getDatabase(); try {