Increase Asynchronous Timeout in High User Load Environments
If you have a high user load (over 165 users) and interactive reports are running continuously in a distributed installation, you may want to increase the asynchronous timeout setting to avoid getting error messages. The default is 30000.
You may also want to set the Queue Time Limit setting to 360. For information, see the IBM Cognos Analytics Administration and Security Guide.
To resolve this problem, increase the wait timeout.