Index: lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java
===================================================================
diff -u -rd7ecd4ec0bd29174cd2385a51e3d276db8a3f7e9 -r03a7895aacb3b1f0830309dfbe2649b37d998c4f
--- lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java	(.../ObjectExtractor.java)	(revision d7ecd4ec0bd29174cd2385a51e3d276db8a3f7e9)
+++ lams_central/src/java/org/lamsfoundation/lams/authoring/ObjectExtractor.java	(.../ObjectExtractor.java)	(revision 03a7895aacb3b1f0830309dfbe2649b37d998c4f)
@@ -1233,12 +1233,9 @@
     private void buildScheduleGateActivity(ScheduleGateActivity activity, ObjectNode activityDetails) {
 	activity.setGateStartTimeOffset(JsonUtil.optLong(activityDetails, AuthoringJsonTags.GATE_START_OFFSET));
 	activity.setGateEndTimeOffset(JsonUtil.optLong(activityDetails, AuthoringJsonTags.GATE_END_OFFSET));
-	activity.setSystemTool(getSystemTool(SystemTool.SCHEDULE_GATE));
-	
 	Boolean isGateActivityCompletionBased = JsonUtil.optBoolean(activityDetails, AuthoringJsonTags.GATE_ACTIVITY_COMPLETION_BASED);
-	//check the previous activity is available as well
-	isGateActivityCompletionBased &= activity.getTransitionTo() != null;
 	activity.setGateActivityCompletionBased(isGateActivityCompletionBased);
+	activity.setSystemTool(getSystemTool(SystemTool.SCHEDULE_GATE));
     }
 
     private void createLessonClass(LessonClass lessonClass, ObjectNode groupingDetails) {
Index: lams_central/web/includes/javascript/authoring/authoringGeneral.js
===================================================================
diff -u -r4d93de876d7c8ade263a2774cd7d155c564d7177 -r03a7895aacb3b1f0830309dfbe2649b37d998c4f
--- lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision 4d93de876d7c8ade263a2774cd7d155c564d7177)
+++ lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision 03a7895aacb3b1f0830309dfbe2649b37d998c4f)
@@ -2457,7 +2457,10 @@
 						             activity instanceof ActivityDefs.ParallelActivity ? 5 : 1,
 				iconPath = null,
 				isGrouped = activity.grouping ? true : false,
-				parentActivityID = activity.parentActivity ? activity.parentActivity.id : null;
+				parentActivityID = activity.parentActivity ? activity.parentActivity.id : null,
+				gateActivityCompletionBased = false,
+				activityTransitions = activity instanceof ActivityDefs.BranchingActivity ?
+						activity.end.transitions : activity.transitions;
 			
 			if (activity.toolID) {
 				activityTypeID = 1;
@@ -2507,7 +2510,13 @@
 			} else if (activity instanceof  ActivityDefs.GateActivity){
 				switch(activity.gateType) {
 					case 'sync'       : activityTypeID = 3; break;
-					case 'schedule'   : activityTypeID = 4; break;
+					case 'schedule'   : 
+						activityTypeID = 4; 
+						gateActivityCompletionBased = activity.gateActivityCompletionBased
+							//check the previous activity is available as well
+							&& (activityTransitions && activityTransitions.to && activityTransitions.to.length > 0);
+						break;
+						
 					case 'permission' : activityTypeID = 5; break;
 					case 'system' 	  : activityTypeID = 9; systemGate = activity; break;
 					case 'condition'  :
@@ -2639,7 +2648,7 @@
 				'defaultActivityUIID'    : activity.defaultActivityUIID,
 				'gateStartTimeOffset'	 : activity.gateType == 'schedule' ?
 											activity.offsetDay*24*60 + activity.offsetHour*60 + activity.offsetMinute : null,
-				'gateActivityCompletionBased' : activity.gateActivityCompletionBased,
+				'gateActivityCompletionBased' : gateActivityCompletionBased,
 				'gateActivityLevelID'    : activity instanceof ActivityDefs.GateActivity ? 1 : null,
 				'minOptions'			 : activity.minOptions || null,
 				'maxOptions'			 : activity.maxOptions || null,
@@ -2649,9 +2658,6 @@
 														null : activity.gradebookToolOutputDefinitionName,
 				'gradebookToolOutputWeight' : activity.gradebookToolOutputWeight
 			});
-	
-			var activityTransitions = activity instanceof ActivityDefs.BranchingActivity ?
-					activity.end.transitions : activity.transitions;
 			
 			if (activityTransitions) {
 				// iterate over transitions and create a list
Index: lams_central/web/includes/javascript/authoring/authoringProperty.js
===================================================================
diff -u -r61f846c3ffdf0635dc2b54832a98c6f694feb3da -r03a7895aacb3b1f0830309dfbe2649b37d998c4f
--- lams_central/web/includes/javascript/authoring/authoringProperty.js	(.../authoringProperty.js)	(revision 61f846c3ffdf0635dc2b54832a98c6f694feb3da)
+++ lams_central/web/includes/javascript/authoring/authoringProperty.js	(.../authoringProperty.js)	(revision 03a7895aacb3b1f0830309dfbe2649b37d998c4f)
@@ -278,7 +278,9 @@
 		if (activity.transitions.to.length == 0){
 			$('.propertiesContentFieldActivityCompletionBased', content)
 				.attr('checked', null)
+				.prop('checked', false)
 				.attr('disabled', 'disabled');
+
 		} else {
 			$('.propertiesContentFieldActivityCompletionBased', content)
 				.attr('disabled', null);