After some period of normal running, the following error may occur when attempting to use the Cognos environment:
RSV-SRV-0040 An application error has occurred. Contact your Administrator.
Logfiles show the following complete message:
Original Error: RSV-SRV-0040 An application error has occurred. Contact your Administrator.
CCLUnexpectedError:0:Fatal: cannot open Crypto lib
Regenerating the cryptographic keys resolves the issue, however after some time the issue returns.
Cognos folders were not added to the exclusion list of the anti-virus software monitoring the server.
Resolving the problem
Add the Cognos directory folder to the list of excluded files for the anti-virus software that is monitoring the server. If in the case of a distributed install, ensure that this is followed on all machines that house Cognos components in the environment.