If you hold down the Ctrl key (Windows) will it allow you to create a clean catalog? We should just determine whether it's a general problem or a specific catalog issue. And does the error message give any further details?
Hi, there is no possibility of creating a new catalogue and als no further details within the error massage. I will uninstall Lr 6 now, delete the program files, restart the PC and will install it again. If the error message occurs again, I will continue this dialogue