"Object reference not set to an instance of an object" when launching Controller, using Master/Slave configuration

Troubleshooting

Problem

User launches Controller client. User receives an error.

Symptom

System.Web.Services.Protocols.SoapException: System.Web.Services.
Protocols.SoapException: Server was unable to process request. --->
System.NullReferenceException: Object reference not set to an instance
of an object.
at Cognos.Controller.Proxy.CCRWS.ConnectionBusiness_SetSelectDb
(String sGuid, String sUser, Boolean bSelectDb)
--- End of inner exception stack trace ---
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 FrServerB.RemoteConnectionBusiness.SetSelectDb(String sGuid,
String sUser, Boolean bSelectDb)
at FrServerB.ConnectionBusiness.SetSelectDb(String sGuid, String
sUser, Boolean bSelectDb)
at Microsoft.VisualBasic.ErrObject.Raise(Int32 Number, Object
Source, Object Description, Object HelpFile, Object HelpContext)
at Cognos.Controller.Common.RaiseErrCli.RaiseError(Int32 lErrNo,
String sErrSource, String sErrDesc, String sErrHelpFile, Int32
lErrHelpContext)
at Cognos.Controller.Direct.ConnectionDirect.SetSelectDb(Boolean
bSelectDb)
at CCR.AppContext.SelectDb()
at CCR.AppContext.Login()

[{"Product":{"code":"SS9S6B","label":"IBM Cognos Controller"},"Business Unit":{"code":"BU048","label":"IBM Software"},"Component":"Controller","Platform":[{"code":"PF033","label":"Windows"}],"Version":"10.3","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:
10.3

Operating system(s):
Windows

Document number:
561033

Modified date:
08 May 2025

UID

swg22003630

IBM Support

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