Index: as3/gunyarapaint/trunk/nicopedia/org/libspark/nicopedia/Com.as
===================================================================
--- as3/gunyarapaint/trunk/nicopedia/org/libspark/nicopedia/Com.as (リビジョン 1562)
+++ as3/gunyarapaint/trunk/nicopedia/org/libspark/nicopedia/Com.as (リビジョン 1564)
@@ -183,5 +183,7 @@
     }
     private function postProgressHandler(evt:ProgressEvent):void {
-      _comDialog.comProgressBar.setProgress(evt.bytesLoaded, evt.bytesTotal);
+      if (_comDialog) {
+        _comDialog.comProgressBar.setProgress(evt.bytesLoaded, evt.bytesTotal);
+      }
     }