For Control Center 18.104.22.168 sometimes there can be issues with running Cognos reports. An error of "the Cognos Business Intelligence server cannot be contacted" can be received. I received instructions from IBM some time ago about how to recycle Cognos without recycling the Control Center engine. I have used this method several times and I believe each time I do, a Tomcat window stays open. If this Window is closed, then Cognos reports will stop working again. There needs to be a better method of recycling the embedded Cognos that is within Control Center.