Index: TestHarness4LAMS2/src/org/lamsfoundation/testharness/admin/MockAdmin.java
===================================================================
diff -u -r883c4cc054a636dc8017da1b244b89bdaf0ff974 -ra4dea2c2d1a6d7b4b8f21c1aad27d4be330b2fb7
--- TestHarness4LAMS2/src/org/lamsfoundation/testharness/admin/MockAdmin.java	(.../MockAdmin.java)	(revision 883c4cc054a636dc8017da1b244b89bdaf0ff974)
+++ TestHarness4LAMS2/src/org/lamsfoundation/testharness/admin/MockAdmin.java	(.../MockAdmin.java)	(revision a4dea2c2d1a6d7b4b8f21c1aad27d4be330b2fb7)
@@ -180,6 +180,11 @@
 			Matcher m = MockAdmin.NEW_USER_ID_PATTERN.matcher(respText);
 			if (m.find()) {
 			    String userId = m.group(1);
+			    if (userId.equals("0")) {
+				log.error(respText);
+				throw new TestHarnessException("Error while creating user " + name
+					+ ". Server returned user ID 0");
+			    }
 			    mockUser.setUserId(userId);
 			    MockAdmin.log.debug("User " + name + " created with ID " + userId);
 			} else {