diff --git a/www/common/sframe-app-framework.js b/www/common/sframe-app-framework.js
index 9710adcf1..efe95ff5c 100644
--- a/www/common/sframe-app-framework.js
+++ b/www/common/sframe-app-framework.js
@@ -713,7 +713,10 @@ define([
                     }
                     nThen(function (waitFor) {
                         var content = fi(c, f);
-                        if (typeof(content) === "undefined") { return; }
+                        if (typeof(content) === "undefined") {
+                            Messages.importError = "Failed to import (wrong format)"; // XXX
+                            return void UI.warn(Messages.importError);
+                        }
                         contentUpdate(content, waitFor);
                     }).nThen(function () {
                         onLocal();