“Authentication Error… No such host” BC Mobile Error

Target Audience: Basic User, Advanced User, IT Manager
Article #: 13205


When the user attempts to connect to a database in the BreadCrumbs BC Mobile app, they see an error message reading “Authentication Error – Error: No Such host is known.” This article shows how to troubleshoot the most common causes of this error.


BC Mobile is unable to connect to the database server to authenticate the user. A connectivity error on the mobile device itself typically causes the issue. For instance, we were able to replicate the error by turning off both WiFi and cellular data on the mobile device and attempting to log in.


Option 1 – Device Connectivity
  1. Check your mobile device’s settings to make sure it is connected WiFi or mobile data.
  2. If both WiFi and cellular data are both enabled, turn off WiFi and attempt to connect.
  3. If you are able to connect using cellular data, then the issue may be with your WiFi network.
  4. If your device and your network are both connected and you are still unable to access the database, move on to Option 2.
Option 2 – Database Connectivity
  1. Check the server’s availability using a computer or another mobile device via an internet browser.
  2. Enter the server’s URL, adding “api/values” to the end of the address.

EXAMPLE: http://breadcrumbs.westus2.cloudapp.azure.com/api/values

  1. If the server is connecting to the internet, you will see a message [“Webservice is: ” “Running”]
    NOTE: this message will be very small on a mobile device.
  2. If you do not see the message, check the server’s connection to the Internet.
  3. If you do see the message, move on to Option 3.

NOTE: The database may be connected but not accessible due to such reasons as firewalls or your cellular provider may not support the connection. Your IT department can assist with this, or you may contact us.

Option 3 – Error with the App

If, after checking your device and your network and you are able to reach the database via a browser, but not the app, the issue may lie with the app itself.

  1. Check to see if you are running the most recent release of the BC Mobile app.
  2. If you are, and the issue is not resolved, please contact us so that we can investigate and resolve the issue.

Additional Comments

Issue found with BC Mobile v1.35

If you need further assistance, please contact us.


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