Resolve error: "Operation canceled. An error occurred connecting to the server. HTTP status code is 500. Unable to retrieve results from the Envinsa Routing Server" using MapInfo Professional Spectrum On Demand

Products affected: Spectrum™
 

Issue

User running MI Pro with a valid URL and credentials for Spectrum On Demand and wishes to create Driving Regions or DriveTimes generates an error:

"Operation canceled. An error occurred connecting to the server.  HTTP status code is 500. Unable to retrieve results from the Envinsa Routing Server"

Cause

 Individual servers can be taken out of service at any time. When that happens, the load balancer directs all traffic to the other servers, so the overall service is not interrupted.
If the user has a cached IP Address, then the creation of Drivetimes will fail with the error:

Operation canceled. An error occurred connecting to the server.  HTTP status code is 500. Unable to retrieve results from the Envinsa Routing Server.

and then 

  X of X input records were skipped.  Input records are skipped if:
    - the record has a non-point object and the "Include only point objects as input" option is checked, or
    - the record does not have a map object

 

Resolution

UPDATED: December 5, 2019
Make sure the customer is is not using a cached IP address for the service. Individual servers can be taken out of service at any time. When that happens, the load balancer directs all traffic to the other servers, so the overall service is not interrupted.


From http://docs.cpanel.net/twiki/bin/view/AllDocumentation/ClearingBrowserCache

Search:
How to clear your DNS cache

The following methods allow removal of old and inaccurate DNS information that may result in 404 errors.

Windows® 8

 

  1. Press Win+X to open the WinX Menu.
  2. Right-click on Command Prompt and select Run as Administrator.
  3. Type the following command and press Enter: ipconfig /flushdns
  4. If the command was successful, you will see the following message:
    Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows 7

  1. Click the Start button.
  2. Enter cmd in the Start menu search field.
  3. Right-click on Command Prompt and select Run as Administrator.
  4. Type the following command and press Enter: ipconfig /flushdns
  5. If the command was successful, you will see the following message:
    Windows IP configuration successfully flushed the DNS Resolver Cache.

Windows XP, 2000, or Vista®

  1. Click the Start button.
  2. On the Start menu, click Run....
    • If you do not see the Run command in Vista, enter run in the Search bar.
  3. Type the following command in the Run text box: ipconfig /flushdns