Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java
===================================================================
RCS file: /usr/local/cvsroot/lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java,v
diff -u -r1.73 -r1.74
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	14 Dec 2006 23:43:47 -0000	1.73
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	6 Feb 2007 23:28:12 -0000	1.74
@@ -656,7 +656,10 @@
 			uo = new UserOrganisation(user, org);
 			save(uo);
 			log.debug("added "+user.getLogin()+" to "+org.getName());
-			Set uos = org.getUserOrganisations();
+			Set uos;
+			if ((uos=org.getUserOrganisations())==null) {
+				uos = new HashSet();
+			}
 			uos.add(uo);
 		}