Index: lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java
===================================================================
diff -u -r365dc9ce7505993afafc7afd82a6c6072dc27560 -rd1d761ae4a40e44d9c49b9f78addcc31e6ffb1e8
--- lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision 365dc9ce7505993afafc7afd82a6c6072dc27560)
+++ lams_monitoring/src/java/org/lamsfoundation/lams/monitoring/web/MonitoringAction.java	(.../MonitoringAction.java)	(revision d1d761ae4a40e44d9c49b9f78addcc31e6ffb1e8)
@@ -1073,13 +1073,13 @@
 	}
 
 	// Fetch number of learners at each activity
-	Long[] activityIds = new Long[activities.size()];
-	int index = 0;
+	ArrayList<Long> activityIds = new ArrayList<Long>();
 	for (Activity activity : activities) {
-	    activityIds[index++] = activity.getActivityId();
+	    activityIds.add(activity.getActivityId());
 	}
-	Map<Long, Integer> learnerCounts = getMonitoringService().getCountLearnersCurrentActivities(activityIds);
-
+	Map<Long, Integer> learnerCounts = getMonitoringService()
+		.getCountLearnersCurrentActivities(activityIds.toArray(new Long[activityIds.size()]));
+	
 	JSONArray activitiesJSON = new JSONArray();
 	for (Activity activity : activities) {
 	    Long activityId = activity.getActivityId();