The webpage cannot be found HTTP 400

by ·Comments Off on The webpage cannot be found HTTP 400

Product:
Cognos Controller 10.4.2
Microsoft Windows 2019 server

Issue:
One user can not login to the new Cognos Controller setup with CA11, after selecting the database he get a error that he can not reach the CA11 website.

It worked in old version of Cognos Controller (where a different version of Cognos Analytics is used).

Solution:

On the CA11 servers, add the following registry value:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters]
"MaxFieldLength"=dword:00032768
"MaxRequestBytes"=dword:01000000

Reboot the windows servers, in correct order, with Cognos Content Manger first.

If a user is member of a lot of AD groups, here login call may be to big for the HTTP settings, therefor a adjustment like this is needed.

More information:

https://www.ibm.com/support/pages/troubleshooting-controller-client-seems-launch-after-selecting-database-logon-screen-fails-appear

https://www.ibm.com/support/pages/troubleshooting-cannot-launch-controller-client-caused-incorrect-selectdb-database-selection-mode-setting

https://www.ibm.com/support/pages/controller-logon-window-does-not-appear-or-webpage-cannot-be-found-appears-after-selecting-database-caused-incorrect-report-server-settings

https://www.ibm.com/support/pages/order-restart-cognos-analytics-servers-distributed-environment

https://its.uiowa.edu/support/article/109196

https://www.ibm.com/support/pages/node/6218316

Other causes can be;

1. Logon to the Controller application server as an administrator
2. From the Start menu, launch “Controller Configuration”
3. Open section “Web Services Server”
4. Open subsection “Report Server”
5. Ensure that the setting for “Report Server” is correct, and can be resolved by the end user’s PC.
Example (when using Cognos Analytics without SSO):
http://my-ca-server.company.com:9300/bi/v1/disp
Example (when using Cognos Analytics with SSO):
http://my-ca-server.company.com/ibmcognos/bi/v1/disp
6. Click “Save”
7. Test.
or

Steps:

  1. Logon to Report Server (Cognos Analytics server) as an administrator
  2. From the Start Menu, launch “Cognos Configuration“
  3. Expand section “Local Configuration – Security – Authentication“
  4. Ensure that the setting “Restrict access to members of the built-in namespace” is set to “True“
  5. After making changes, restart the Cognos service (for example restart the ‘IBM Cognos’ Windows service).

or

Steps:

  1. Logon to Report Server (BI server) as an administrator
  2. From the Start Menu, launch “Cognos Configuration“
  3. Expand section “Local Configuration – Security – Authentication – Cognos“
  4. Ensure that the setting “Allow anonymous access” is set to “False“
  5. After making changes, restart the Cognos reporting service.

or

Modify all IIS/SSO settings (for example the ‘Rewrite rules’) to use the lowercase value for the URLs.
All server references in Cognos and IIS must be lowercase.

but all above will give, that all users have the same issue.