Error: TypeError: Cannot call method 'toString' of undefined" in Park and Recreation Finder

Error Message

The following error message is returned in the Park and Recreation Finder application when one of the 'Share this map' options (Facebook, Twitter, or email) is clicked.

“TypeError: Cannot call method 'toString' of undefined”

This error applies to the Park and Recreation Finder (ArcGIS 10) download.


The share map options in the Park and Recreation Finder use a URL-compacting service called json-tinyurl.appspot.com. This service can fail when it reaches one of its daily quotas. When this happens, the share map feature fails until the service's usage counts are reset at 12:00 AM the next day.

Solution or Workaround

Change the application's URL-compacting service from using json-tinyurl.appspot.com to a different URL-compacting service.

One alternative service is bit.ly. If bit.ly is selected to replace json-tinyurl.appspot.com, it is necessary to make a one-time change to the Park Finder's software because bit.ly returns a more structured response. After this change, the software can handle either service: json-tinyurl.appspot.com or bit.ly.

  1. Navigate to ParkRecreationFinder > Application > ParkFinder and open Config.txt for editing.
  2. Replace the text

    "URL": "http://json-tinyurl.appspot.com/?url=${0}" , "ResponseAttribute": "tinyurl",


    "URL": "http://api.bit.ly/v3/shorten?login=esri&apiKey=R_65fd9891cd882e2a96b99d4bda1be00e&uri=${0}&format=json" , "ResponseAttribute": "data.url",

    and save the file.
  3. Open JS\Utils.js for editing.
  4. Delete line 83.

    var tinyUrl = data[tinyURLServiceURL.ResponseAttribute];

  5. Insert the following lines in place of line 83

    var tinyUrl = data;
    // Follow a chain of nested attributes if necessary
    var attr = tinyURLServiceURL.ResponseAttribute.split(".");
    for (var x = 0; x < attr.length; x++) {
    tinyUrl = tinyUrl[attr[x]];

    and save the file.