Troubleshooting
Problem
In Cognos Analytics 11.1.0 - 11.1.6, if TLS 1.0 is disabled in Windows, you may encounter these problems:
- In Cognos Configuration, you test the Content Manager connection without SSL, but the Microsoft JDBC Driver returns the following error message:
Unexpected Error occurred attempting to open an SQL connection.
class java.io.IOException: SQL Server did not return a response. The connection has been closed. - You cannot start Cognos Analytics.
Document Location
Worldwide
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Document Information
Modified date:
14 January 2026
UID
ibm16198384