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Troubleshooting
Problem
User launches Controller. User receives error message.
Symptom
The error will vary slightly depending on Controller version.
Example #1 - Controller 10.1.0:

An error occurred while trying to access the server.
Please enter a valid server URL or contact your system administrator for assistance.
Example #2 - Controller 10.4.1:
An error occured while trying to access the server:
http://<servername>/ibmcognos/controllerserver
http://<servername>/ibmcognos/controllerserver
Details:
The request failed with HTTP status 407: Proxy Authorization Required.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Cognos.Controller.ControllerSoapHttpClientProtocol.Invoke(String methodname, Object[] parameters)
at Cognos.Controller.Proxy.Light.WSLight.CheckServerConnection(String sGuid, String sUser)
at Cognos.Controller.Direct.ServerInfoD.CheckServerConnection()
at CCR.AppContext.CheckConnectionToServer()
The request failed with HTTP status 407: Proxy Authorization Required.
at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
at Cognos.Controller.ControllerSoapHttpClientProtocol.Invoke(String methodname, Object[] parameters)
at Cognos.Controller.Proxy.Light.WSLight.CheckServerConnection(String sGuid, String sUser)
at Cognos.Controller.Direct.ServerInfoD.CheckServerConnection()
at CCR.AppContext.CheckConnectionToServer()
[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"All Versions","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}},{"Product":{"code":"SSMRTZ","label":"IBM Cognos Controller on Cloud"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":" ","Platform":[{"code":"","label":""}],"Version":"","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]
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Document Information
More support for:
IBM Cognos Controller
Software version:
All Versions
Operating system(s):
Windows
Document number:
252365
Modified date:
08 May 2025
UID
swg21685825
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