diff -r bae9b96bfd2c -r e9b07d41de7f javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/ConvertTypes.java
--- a/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/ConvertTypes.java	Mon Apr 15 21:56:56 2013 +0200
+++ b/javaquery/api/src/main/java/org/apidesign/bck2brwsr/htmlpage/ConvertTypes.java	Tue Apr 16 08:39:54 2013 +0200
@@ -161,6 +161,7 @@
                 jsonResult[0] = convertToArray(obj);
             } catch (JSONException | IOException ex) {
                 jsonResult[0] = ex;
+                LOG.log(Level.WARNING, "Cannot connect to " + url, ex);
             } finally {
                 Platform.runLater(this);
             }