Index: lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorModel.as
===================================================================
diff -u -r0e378dd9696fcf3cd772974aa98f0cef54fdb972 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
--- lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorModel.as	(.../MonitorModel.as)	(revision 0e378dd9696fcf3cd772974aa98f0cef54fdb972)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorModel.as	(.../MonitorModel.as)	(revision 3ae4179b4bcf1d3075cb59e1ab9600c664720fff)
@@ -574,6 +574,17 @@
 		_indexSelected = idxSelected;
 	}
 	
+	public function setButtonState(btnName:String, btnState:Boolean, btnVisible:Boolean, tabId:Number) {
+		setChanged();
+		infoObj = {};
+		infoObj.updateType = "BUTTON";
+		infoObj.tabID = tabId;
+		infoObj.button = btnName;
+		infoObj.buttonstate = btnState;
+		infoObj.buttonvisible = btnVisible;
+		notifyObservers(infoObj);
+	}
+	
 	public function sendButtonUpdate():Void {
 		//Set flag for notify observers
 		setChanged();
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorView.as
===================================================================
diff -u -r1413a40fdb1d979bbada4550a9bd588e36f370e8 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
--- lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorView.as	(.../MonitorView.as)	(revision 1413a40fdb1d979bbada4550a9bd588e36f370e8)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/MonitorView.as	(.../MonitorView.as)	(revision 3ae4179b4bcf1d3075cb59e1ab9600c664720fff)
@@ -206,22 +206,32 @@
 			case 'EXPORTSHOWHIDE' :
 				exportShowHide(infoObj.data);
 				break;
-			case 'TIMECHARTSHOWHIDE' :
-				timeChartShowHide(infoObj.data);
-				break;
 			case 'JOURNALSSHOWHIDE' :
 				journalsShowHide(infoObj.data);
 				break;
 			case 'EDITFLYSHOWHIDE' :
 				editFlyShowHide(infoObj.data);
 				break;
+			case 'BUTTON' :
+				if (infoObj.tabID == mm.getSelectedTab()){
+					setButtonState(infoObj);
+				}
+				break;
             default :
                 Debugger.log('unknown update type :' + infoObj.updateType,Debugger.CRITICAL,'update','org.lamsfoundation.lams.MonitorView');
 		}
 
 	}
 	
 	/**
+    * Sets a button's state, called from update
+    */
+	private function setButtonState(infoObj:Object):Void{
+		this[infoObj.button].enabled = infoObj.buttonstate;
+		this[infoObj.button].visible = (infoObj.buttonvisible != null) ? infoObj.buttonvisible : true ;
+	}
+	
+	/**
     * Sets the size of the canvas on stage, called from update
     */
 	private function showData(mm:MonitorModel):Void{
@@ -232,10 +242,6 @@
 		exportPortfolio_btn.visible = v;
 	}
 	
-	private function timeChartShowHide(v:Boolean):Void{
-		viewAllTimeChart_btn.visible = v;
-	}
-	
 	private function journalsShowHide(v:Boolean):Void{
 		viewJournals_btn.visible = v;
 	}
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LearnerTabView.as
===================================================================
diff -u -r1413a40fdb1d979bbada4550a9bd588e36f370e8 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
--- lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LearnerTabView.as	(.../LearnerTabView.as)	(revision 1413a40fdb1d979bbada4550a9bd588e36f370e8)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LearnerTabView.as	(.../LearnerTabView.as)	(revision 3ae4179b4bcf1d3075cb59e1ab9600c664720fff)
@@ -158,7 +158,6 @@
 					if (infoObj.tabID == _tabID && !mm.locked){
 						hideMainExp(mm);
 						mm.broadcastViewUpdate("JOURNALSSHOWHIDE", true);
-						mm.broadcastViewUpdate("TIMECHARTSHOWHIDE", true);
 						adjustLearnerPanel(mm);
 						
 						if (mm.activitiesDisplayed.isEmpty()){
@@ -212,12 +211,15 @@
 					break;
 				case 'DRAW_DESIGN' :
 					Debugger.log("DRAW_DESIGN received",Debugger.CRITICAL,"update","LearnerTabView");
-					if (infoObj.tabID == _tabID && !mm.locked){
-						adjustLearnerPanel(mm);
-						if (mm.isDesignDrawn) {
-							clearCanvas(mm);
+					if (infoObj.tabID == _tabID){
+						showEnableTimeChartButtonIfProgressMade(mm, infoObj);
+						if (!mm.locked) {
+							adjustLearnerPanel(mm);
+							if (mm.isDesignDrawn) {
+								clearCanvas(mm);
+							}
+							drawAllLearnersDesign(mm, infoObj.tabID);
 						}
-						drawAllLearnersDesign(mm, infoObj.tabID);
 					}
 					break;
 				case 'DRAW_ALL' :
@@ -233,6 +235,20 @@
 			}
 	}
 	
+	// show the TimeChart btn, but only enable it if one of the learners has made enough progress to populate the graphs/charts
+	private function showEnableTimeChartButtonIfProgressMade(mm:MonitorModel, infoObj:Object) { 
+		if (mm.getlearnerTabActArr().length > 0) {
+			var learnerTabActArr = mm.getlearnerTabActArr();
+			for (var i=0; i<learnerTabActArr.length; i++) {
+				if (learnerTabActArr[i].getAttemptedActivities().length > 1 || learnerTabActArr[i].getCompletedActivities().length >= 1) {
+					mm.setButtonState("viewAllTimeChart_btn", true, true, _tabID);
+					return;
+				}
+			}
+		}
+		mm.setButtonState("viewAllTimeChart_btn", false, true, _tabID);
+	}
+	
 	private function drawAll(){
 		drawCount = 0;
 		
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LessonTabView.as
===================================================================
diff -u -rb3c3f6c6fc713cfa940a7f0f1924c2e8e4d601bb -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
--- lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LessonTabView.as	(.../LessonTabView.as)	(revision b3c3f6c6fc713cfa940a7f0f1924c2e8e4d601bb)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/LessonTabView.as	(.../LessonTabView.as)	(revision 3ae4179b4bcf1d3075cb59e1ab9600c664720fff)
@@ -195,7 +195,7 @@
 					mm.getMonitor().getMV().getMonitorLessonScp()._visible = true;
 					hideMainExp(mm);
 					mm.broadcastViewUpdate("JOURNALSSHOWHIDE", false);
-					mm.broadcastViewUpdate("TIMECHARTSHOWHIDE", false);
+					mm.setButtonState("viewAllTimeChart_btn", true, false, _tabID);
 					
 					if(mm.getIsProgressChangedLesson()){
 						reloadProgress(false);
@@ -212,7 +212,7 @@
 						mm.getMonitor().getMV().getMonitorLessonScp()._visible = true;
 						hideMainExp(mm);
 						mm.broadcastViewUpdate("JOURNALSSHOWHIDE", false);
-						mm.broadcastViewUpdate("TIMECHARTSHOWHIDE", false);
+						mm.setButtonState("viewAllTimeChart_btn", true, false, _tabID);
 						
 						MovieClipUtils.doLater(Proxy.create(this,draw));
 					
Index: lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/MonitorTabView.as
===================================================================
diff -u -r2dd65b84334012d958de5a9c6588ded951c52dc6 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
--- lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/MonitorTabView.as	(.../MonitorTabView.as)	(revision 2dd65b84334012d958de5a9c6588ded951c52dc6)
+++ lams_flash/src/central/flash/org/lamsfoundation/lams/monitoring/mv/tabviews/MonitorTabView.as	(.../MonitorTabView.as)	(revision 3ae4179b4bcf1d3075cb59e1ab9600c664720fff)
@@ -142,7 +142,7 @@
 						mm.getMonitor().getMV().getMonitorSequenceScp()._visible = true;
 						hideMainExp(mm);
 						mm.broadcastViewUpdate("JOURNALSSHOWHIDE", false);
-						mm.broadcastViewUpdate("TIMECHARTSHOWHIDE", false);
+						mm.setButtonState("viewAllTimeChart_btn", true, false, _tabID);
 						
 						if (mm.activitiesDisplayed.isEmpty() || mm.transitionsDisplayed.isEmpty()){
 							redrawCanvas(o.hasChanged());
Index: lams_monitoring/web/lams_monitoring.swf
===================================================================
diff -u -rf300f5ac56cbfa5e28c645151088271647ddbfb7 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
Binary files differ
Index: lams_monitoring/web/lams_monitoring_library.swf
===================================================================
diff -u -rf300f5ac56cbfa5e28c645151088271647ddbfb7 -r3ae4179b4bcf1d3075cb59e1ab9600c664720fff
Binary files differ