Hi everyone, I am suddenly experiencing some issues with Cognos 11.0.13. When I try to run any report, nothing happens and the request eventually times out.
In the cognosserver.log file it appears that the issue is related to BIBusTKServerMain, and specifically the logged message is:
"Process BIBusTKServerMain failed to start properly."

Dashboards, on the other hand, work correctly, which is consistent with the fact that they use a different engine than reports. This also leads me to believe that the issue is unlikely to be related to the content store.

What troubleshooting steps would you recommend?

Thank you

Hi Fl,

I would take a look at your bin directory to see if you have any DMP files (sort by filesize in descending order).  If you do, document how often they are occurring (daily, hourly, etc) to see if you can see a pattern (same time of the day, week, etc) and then delete them.  

Are there any BIBusTKServerMain's running in the task manager (assuming this is a windows environment)?  If yes, kill them and try to run the reports.

Check your drive space to ensure there is plenty of space available. 

Hope this helps.

Hi Fl,

Since dashboards are working but reports are timing out, the issue is likely isolated to the Report Service (BIBusTKServerMain) rather than the Content Store or dispatcher.

I would suggest to try below st

1. Check for DMP files
   Look in <cognos_install>/bin for large .dmp files. If they are recurring, it may indicate a JVM crash or memory issue. Note the timestamps and clear old ones if needed.

2. Check for orphaned BIBusTKServerMain processes
   In Task Manager (Windows), see if multiple BIBusTKServerMain.exe processes are running. If so, stop Cognos, kill any remaining processes, and restart cleanly.

3. Verify disk space and permissions
   Ensure there is sufficient free disk space, especially on the system drive and temp directories. Confirm the Cognos service account still has proper write permissions.

4. Review the logs before the error
   The failed to start properly message is usually a symptom. Check cognosserver.log for earlier errors such as OutOfMemoryError, RSV*, CM*, or DPR* entries.

5. Confirm Report Service status
   In Administration Console -> Status -> System, verify that Report Service and Batch Report Service are running.

If the issue started suddenly, also consider checking on recent OS Updates, Java updates, or environmental changes.

Let us know what appears in the log just before the failure message, I would be happy to help!!

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Anand Kushwaha
https://www.linkedin.com/in/anandkushwaha064/
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