The Network Errors tab provides a summary for all network errors detected during the script playback. Detailed descriptions of error codes can also be found here.

Playback of a script can reveal unreachable URLs. In such cases, the EveryStep Web Recorder will suggest ignoring such problem URLs during monitoring. 

If the playback reveals objects which are unreachable, such as an HTTP status code 500 Internal Server Error, HTTP error 512, or a 404 Not Found response, you can select the errors using the related check-box and choose to filter out those elements by selecting the Ignore button. 

Doing so will filter out the error(s) so they don’t affect the playback of the script. This operation performs the same action as adding a filter for those objects manually, using the Network Filter option.

Example: 

NetworkFilter.Deny (“http://www.example.com/FilteredOutElement.ttf“);