Product:
Cognos Controller 11.0.1200.28

Microsoft Windows 2022 Server

Issue:

Most users get that the Cognos Controller client hang, when they open some selection dialogs. For example – go to Maintain – Account Structure Reports – select codes – and click on the … for the account field, to get a list of all the accounts.  Here the Cognos Controller client hang, and you have to stop cognos controller from the task manager.

Possible Solution:

Do a optimize on the database from inside cognos controller client.

1. To run the optimization immediately, the system must be in single user mode. Go to Maintain > User > Single Mode and set the system to single mode.
2. Click Maintain > Database > Optimize. The Optimize Database window opens.
3. Select the Rebuild Structure Tables check box to rebuild the structure tables.
4. Select Rebuild Indexes (advanced option).
5. Click Run

 

Other things you can try to solve the issue are:

Clear the cache in cognos controller

Inside Controller Client program, via Maintain > Special Utilities > Clear Local Cache.

 

Change the cache folder for cognos controller client:

Launch Windows Explorer
4. Open the folder where Controller is installed.

• Default this is here: C:\Program Files\ibm\IBM Cognos Controller Local Client

5. Open the file “CCR.exe.config” inside Notepad++
6. Search for the entry similar to the following:
<add key=”CacheDir” value=””/>
7. Modify this entry appropriately, for example similar to the following:
<add key=”CacheDir” value=”D:\Controller\Cache” />
8. Save and test

Start Cognos Controller client, and try to open the same account list.

 

There are 3 types of cache folder used by Cognos Controller Client:
(1) Microsoft Internet Explorer cache at C:\Documents and Settings\%USERNAME%\Local Settings\Temporary Internet Files
(2) Microsoft .NET components at C:\Documents and Settings\%username%\Local Settings\Application Data\assembly
(3) Controller user cache files: at C:\Documents and Settings\%appdata%\Application Data\Cognos\ccr\

If there is damage files in this folders, can give strange errors inside Cognos Controller Client program.

 

More information:

Optimize the Database – IBM Documentation

FAQ – What does an ‘internal’ database optimise do, and how often should I run a database optimize?

https://www.ibm.com/support/pages/how-modify-controller-use-different-location-its-temporary-cache-files 

https://www.ibm.com/support/pages/error-systemxml-root-element-missing-inside-multiple-menus-controller-caused-appdata-redirected-unc-path 

https://www.ibm.com/support/pages/explanation-why-cognos-controller-client-side-cache-file-folders-can-be-very-large-and-how-housekeep-them

https://www.ibm.com/support/pages/how-automatically-clear-local-cache-when-closing-controller

https://www.ibm.com/support/pages/controller-microsoft-sql-database-optimisation-and-maintenance-proven-practice-best-practice 

https://www.ibm.com/support/pages/massive-sql-transaction-logs-caused-rebuilding-sql-indexes

https://www.ibm.com/support/pages/reducing-size-controller-database-deleting-period-locking-company-records-table-xacclock

 

You can use Cognos Controller database optimize function to make the following database changes:

• Remove Period Zero Values – clears the value 0 from selected period tables.
• Rebuild Structure Tables – which gives quicker access to data.
• Rebuild Indexes (advanced option) – Rebuilds all indexes in the database to enhance performance and give quicker access to data.
• Analyze Schema (advanced option) – Reanalyzes the schema for Oracle database.