https://launchpad.support.sap.com/#/notes/0001755302
Hello,
Thank you for your helpful answer. It works but if I have to this for all my reports I will be busy till the end of the year I think.
I did create a ticket at SAP Support site and after 3 hours of phone conversation and many option testing I finally learned that KB 1755302 is the solution to my problem.
Best regards to everyone!