Dear Christof,
thank you very much for your very comprehensive answer!
I think you guys do a great job in this forum!
I apparently confused myself with a number of points, as I didn't know that I need orbitals for a Mulliken population analysis. I thought a density would be enough; clearly, there are no "excited state orbitals" I can get from e.g. CC2, ...
For my local TURBOMOLE v. 5.10, however, ricc2 (both with and without the -proper flag) does run in analysis mode, but won't give any population analysis. It does find all density files I specify in control at $anadens, but skips both paboon- and nbo-type PAs,
stating
Now analysing density file "ccs-tmf0-1a-002.cao"
Population analysis disabled for this density ... skipped
If I didn't make a stupid mistake, things are Ok for me, as I would not be able to fix it anyway. However, I will stop trying then ...
Thank you again for your support, Christof and Arnim,
Best regards, Jonas