Could not load file or assembly ‘stdole,


Cognos Controller 10.1 RTM

Windows 2008 R2 server


When start Cognos Controller client for the first time, it stop at the WSSurl value.

To try to troubleshoot you surf to http://servername/ibmcognos/controllerserver/ccrws.asmx.


Error Message:

Server Error in ‘/ibmcognos/controllerserver’ Application.


Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.


Parser Error Message: Could not load file or assembly ‘stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.


Source Error:

Line 36:         <add assembly=”ADODB, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 37:         <add assembly=”MSDATASRC, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 38:         <add assembly=”stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 39:         <add assembly=”Microsoft.StdFormat, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A” />

Line 40:       </assemblies>


Source File: E:\Program Files (x86)\ibm\cognos\c10\ControllerProxyServer\web.config Line: 38


Assembly Load Trace: The following information can be helpful to determine why the assembly ‘stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ could not be loaded.


WRN: Assembly binding logging is turned OFF.

To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.

Note: There is some performance penalty associated with assembly bind failure logging.

To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].


Version Information: Microsoft .NET Framework Version:2.0.50727.5448; ASP.NET Version:2.0.50727.5456



Missing file “stdole.dll” on application server



Install SQL 2005 32 client on Controller Applications server, including Workstation components, Books Online and development tools.


Or upgrade to latest version of Cognos Controller


More Information: