diff --git a/Viewer/features/core.js b/Viewer/features/core.js
index 1f29993a..f450d62b 100755
--- a/Viewer/features/core.js
+++ b/Viewer/features/core.js
@@ -2548,7 +2548,10 @@ function(title, func){
 			return Object.assign(
 				this.tasks.Task(...pre_args, func.bind(this), ...args), 
 				// make this searchable by .tasks.named(..)...
-				{ name: action.name }) }),
+				{ 
+					__session_task__: action.__session_task__,
+					name: action.name, 
+				}) }),
 		{
 			title,
 			toString: function(){
@@ -2617,7 +2620,10 @@ function(title, func){
 							var res = func.call(that, ...args) 
 							resolve(res)
 							return res }),
-			   		{ title: action.name }) }) }),
+			   		{ 
+						__session_task__: action.__session_task__,
+						title: action.name, 
+					}) }) }),
    		{
 			title,
 			toString: function(){
@@ -2681,6 +2687,12 @@ function(title, func){
 // XXX might be a good idea to split this into a generic and domain parts 
 // 		and move the generic part into types/runner...
 // XXX check if item is already in queue...
+// XXX BUG: when chaining queues, aborting both queues works fine, aborting 
+// 		one for some reason does not lead to aborting the other...
+// 		...this can be fixed by clearing the queue on abort but that is 
+// 		a stub, need to figure out the real reason...
+// 		see: .exampleChainedQueueHandler([1,2,'abort',4])
+// 			...'abort' will stop pre-processing but will not prevent processing...
 var queueHandler =
 module.queueHandler =
 function(title, func){
@@ -2726,6 +2738,7 @@ function(title, func){
 						{},
 						opts || {},
 						{ 
+							__session_task__: action.__session_task__,
 							// XXX not sure about this...
 							//auto_stop: true,
 							handler: function([item, args]){
@@ -2742,18 +2755,29 @@ function(title, func){
 						items.map(function(e){ 
 								return [e, ...args] }) 
 						: [items, ...args]))
-					// make a promise...
-					return new Promise(function(resolve, reject){
-						q.then(resolve, reject) }) } } 
+					return q.promise() } } 
 
 			// pre-process args...
 			arg_handler
-				&& (inputs = arg_handler.call(this, q, inputs[0], ...inputs.slice(1)))
+				&& (inputs = arg_handler.call(this, q, ...inputs))
+
 			// run...
-			return (inputs instanceof Promise 
-					|| inputs instanceof runner.Queue) ?
-				inputs.then(function(items){
-					return run([items, ...args]) })
+			return inputs instanceof Promise ?
+				// XXX BUG? .then(resolve) is triggered even if inputs was 
+				// 		stopped (should not resolve) or aborted (should reject)...
+				inputs.then(
+					function(items){
+						return run([items, ...args]) },
+					function(){
+						q && q.abort() })
+				: inputs instanceof runner.Queue ?
+					inputs
+						.on('stop', function(){ 
+							q && q.stop() })
+						.on('abort', function(){ 
+							q && q.abort() })
+						.then(function(items){
+							return run([items, ...args]) })
 				: run(inputs) }),
    		{
 			title,
@@ -2809,7 +2833,10 @@ var TaskActions = actions.Actions({
 	// session tasks are stopped when the index is cleared...
 	// XXX need to get running tasks by action name...
 	get sessionTasks(){
-		return this.tasks.titled(...this.sessionTaskActions) },
+		//return this.tasks.titled(...this.sessionTaskActions) },
+		return this.tasks
+			.filter(function(task){
+				return task.__session_task__ }) },
 
 
 	// Queue (task)...
@@ -2863,7 +2890,10 @@ var TaskActions = actions.Actions({
 			if(queue == null){
 				var abort = function(){
 					options.nonAbortable
-						|| queue.clear() }
+						|| queue
+							// XXX abort or stop???
+							.abort()
+							.clear() }
 				var cleanup = function(){
 					return function(){
 						queue.stop()
@@ -2895,8 +2925,10 @@ var TaskActions = actions.Actions({
 					.on('taskFailed', function(evt, t, err){ 
 						this.logger && this.logger.emit('skipped'+suffix, t, err) }) 
 					.on('stop', function(){
-						this.logger 
-							&& this.logger.emit('reset') 
+						this.logger && this.logger.emit('reset') 
+						this.clear() })
+					.on('abort', function(){
+						this.logger && this.logger.emit('reset') 
 						this.clear() })
 				// cleanup...
 				queue
@@ -2924,7 +2956,9 @@ module.Tasks = ImageGridFeatures.Feature({
 	handlers: [
 		// stop session tasks...
 		['clear',
-			'sessionTasks.stop'],
+			// XXX BUG: for some reason calling .abort here does not work...
+			//'sessionTasks.stop'],
+			'sessionTasks.abort'],
 	],
 })
 
diff --git a/Viewer/features/examples.js b/Viewer/features/examples.js
index 269c5575..fa545baa 100755
--- a/Viewer/features/examples.js
+++ b/Viewer/features/examples.js
@@ -344,12 +344,22 @@ var ExampleActions = actions.Actions({
 	exampleChainedQueueHandler: ['- Test/',
 		core.queueHandler('Main queue',
 			core.queueHandler('Sub queue',
+				// pre-prepare the inputs (sync)...
 				function(outer_queue, inner_queue, items, ...args){
 					console.log('### PRE-PREP', items, ...args)
-					return [items, ...args] },
-				function(item, ...args){
-					console.log('### PREP', item, ...args)
+					return [items, outer_queue, ...args] },
+					//return [items, inner_queue, ...args] },
+				// prepare inputs (async/queue)...
+				function(item, q, ...args){
+					console.log('### PREP', q.state, item, ...args)
+					item == 'abort'
+						&& q.abort()
+						&& console.log('### ABORT', q)
+					item == 'stop'
+						&& q.stop()
+						&& console.log('### STOP')
 					return item+1 }),
+			// handle inputs (async/queue)... 
 			function(item, ...args){
 				console.log('### HANDLE', item, ...args)
 				return item*2 }) ],