diff --git a/ChartingSpace/TimeMachine.js b/ChartingSpace/TimeMachine.js
index d11bacf51..948938cd1 100644
--- a/ChartingSpace/TimeMachine.js
+++ b/ChartingSpace/TimeMachine.js
@@ -528,6 +528,8 @@ function newTimeMachine () {
   }
 
   function draw () {
+    if (thisObject.payload === undefined) { return }
+    if (thisObject.payload.node === undefined) { return }
     if (thisObject.container.frame.isInViewPort()) {
       for (let i = 0; i < thisObject.timelineCharts.length; i++) {
         let timelineChart = thisObject.timelineCharts[thisObject.timelineCharts.length - i - 1]
diff --git a/DesignSpace/Workspace/Workspace.js b/DesignSpace/Workspace/Workspace.js
index d061988c8..e9075d8a7 100644
--- a/DesignSpace/Workspace/Workspace.js
+++ b/DesignSpace/Workspace/Workspace.js
@@ -182,9 +182,23 @@ function newWorkspace () {
         if (rootNode.networkNodes !== undefined) {
           for (let j = 0; j < rootNode.networkNodes.length; j++) {
             let networkNode = rootNode.networkNodes[j]
-            for (let i = 0; i < networkNode.taskManagers.length; i++) {
-              let taskManager = networkNode.taskManagers[i]
-              taskManager.payload.uiObject.menu.internalClick('Stop All Tasks')
+            if (networkNode.dataMining !== undefined) {
+              for (let i = 0; i < networkNode.dataMining.taskManagers.length; i++) {
+                let taskManager = networkNode.dataMining.taskManagers[i]
+                taskManager.payload.uiObject.menu.internalClick('Stop All Tasks')
+              }
+            }
+            if (networkNode.testingEnvironment !== undefined) {
+              for (let i = 0; i < networkNode.testingEnvironment.taskManagers.length; i++) {
+                let taskManager = networkNode.testingEnvironment.taskManagers[i]
+                taskManager.payload.uiObject.menu.internalClick('Stop All Tasks')
+              }
+            }
+            if (networkNode.productionEnvironment !== undefined) {
+              for (let i = 0; i < networkNode.productionEnvironment.taskManagers.length; i++) {
+                let taskManager = networkNode.productionEnvironment.taskManagers[i]
+                taskManager.payload.uiObject.menu.internalClick('Stop All Tasks')
+              }
             }
           }
         }