Index: lams_central/web/includes/javascript/authoring/authoringGeneral.js
===================================================================
RCS file: /usr/local/cvsroot/lams_central/web/includes/javascript/authoring/authoringGeneral.js,v
diff -u -r1.51.2.37 -r1.51.2.38
--- lams_central/web/includes/javascript/authoring/authoringGeneral.js	8 Jun 2016 11:28:29 -0000	1.51.2.37
+++ lams_central/web/includes/javascript/authoring/authoringGeneral.js	5 Jul 2016 07:33:04 -0000	1.51.2.38
@@ -47,6 +47,8 @@
 		'liveEdit'   : false,
 		// should the sequence be saved before exiting?
 		'modified'   : false,
+		// was start point of a new branching placed?
+		'addBranchingStart' : null,
 		// list of all dialogs, so they can be easily closed all at once 
 		'dialogs' : [],
 		// icons for special activities
Index: lams_central/web/includes/javascript/authoring/authoringHandler.js
===================================================================
RCS file: /usr/local/cvsroot/lams_central/web/includes/javascript/authoring/authoringHandler.js,v
diff -u -r1.16.2.7 -r1.16.2.8
--- lams_central/web/includes/javascript/authoring/authoringHandler.js	10 Sep 2015 11:03:43 -0000	1.16.2.7
+++ lams_central/web/includes/javascript/authoring/authoringHandler.js	5 Jul 2016 07:33:04 -0000	1.16.2.8
@@ -221,6 +221,17 @@
 		      .off('mousedown')
 		      .off('mouseup')
 		      .off('mousemove');
+		
+		// if the user started adding a branching and did not finish it
+		if (layout.addBranchingStart){			
+			layout.infoDialog.text('').dialog('close');
+			
+			if (layout.addBranchingStart instanceof ActivityDefs.BranchingEdgeActivity) {
+				layout.activities.splice(layout.activities.indexOf(layout.addBranchingStart), 1);
+				layout.addBranchingStart.items.remove();
+			}
+			layout.addBranchingStart = null;
+		}
 
 		if (init) {
 			 // if clicked anywhere, activity selection is gone
Index: lams_central/web/includes/javascript/authoring/authoringMenu.js
===================================================================
RCS file: /usr/local/cvsroot/lams_central/web/includes/javascript/authoring/authoringMenu.js,v
diff -u -r1.34.2.14 -r1.34.2.15
--- lams_central/web/includes/javascript/authoring/authoringMenu.js	25 Jun 2016 14:39:47 -0000	1.34.2.14
+++ lams_central/web/includes/javascript/authoring/authoringMenu.js	5 Jul 2016 07:33:04 -0000	1.34.2.15
@@ -157,6 +157,8 @@
 		var dialog = layout.infoDialog.text(LABELS.BRANCHING_START_PLACE_PROMPT);
 		dialog.dialog('open');
 		
+		layout.addBranchingStart = true;
+		
 		var branchingActivity = null;
 		canvas.css('cursor', 'pointer').click(function(event){
 			// pageX and pageY tell event coordinates relative to the whole page
@@ -179,6 +181,7 @@
 			} else {
 				// extract main branchingActivity structure from created start point
 				branchingActivity = branchingEdge.branchingActivity;
+				layout.addBranchingStart = branchingEdge;
 				dialog.text(LABELS.BRANCHING_END_PLACE_PROMPT);
 			}
 		});