Hi Carsten,
Sorry, I don't speak German so I've translated your question in English.
You can upgrade from v11.1.7 to v12.0.0 without any issue. Of course, you need to backup everything before, but it is a quite simple upgrade.
You need to know that the following components are removed from Cognos Analytics:
- Query Studio
- Analysis Studio
- Cognos Workspace
Make sure all your environment is supported: https://www.ibm.com/support/pages/node/6966712
Best regards,
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Patrick Neveu
Positive Thinking Company
IBM Champion
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