Hi,

many thanks for the help! That code of yours might prove useful going forward - hidden cells are not so uncommon.
In this case, however, they are only filtered for reasons I know now - and further down, there are more lines which are filtered. By use of another formula inbetween and a COUNTIFS, it works fine now.
It's probably not the most elegant or slimmest possible routine, but it works, that is the target.

Best regards,

Officer_Bierschnitt