End users always play a lot with their machines, they install and uninstall so much stuff. One of our end user actually installed some new softwares on his machine and he played around with the services and config files. This lead to COGNOS down. We tried to restart the services both from back-end and front-end but no use. Usually we used to face this error due to the integrated security login that we have on COGNOS, so I removed the class file on configuration and tried it again. This time, the error was at a higher level --- " Generating cryptographic information "
So I tried this simple solution, :) replacing the configuration files @ location .....c8\configuration\signkeypair . There are 5 files in all, I copied these files from my local machine and replaced them at the end user's machine. Things started working fine.
F Y I -- Once COGNOS is installed; replacing any file within COGNOS installed files can be done with out any issues. If in case COGNOS is down but you want to take back up of the content store before re-installing it (the usual solution that IBM COGNOS gives us )... simple copy the entire folder of ...\c8\contentstore from the server and take a back up. Then uninstall and reinstall the COGNOS. Now replace the Content Store back up folder in the new installation folder. You should be all set to go.
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