diff --git a/src/iscs/shape/group.js b/src/iscs/shape/group.js
index 984be25f6..f7413cfad 100644
--- a/src/iscs/shape/group.js
+++ b/src/iscs/shape/group.js
@@ -21,7 +21,7 @@ export default class rect extends Group {
     create() {
         let rect = null;
         for (const key in this.model.elemMap) {
-            if (Vue.prototype.$iscs.iscsDevice[key].instance) {
+            if (Vue.prototype.$iscs.iscsDevice[key] && Vue.prototype.$iscs.iscsDevice[key].instance) {
                 if (!rect) {
                     rect = Vue.prototype.$iscs.iscsDevice[key].instance.getBoundingRect();
                 } else {