Hi Keet,

Thank you very much for your extensive explanation!

I thought that the 3rd possible cause would most likely be the issue (the default Windows viewer does show the green color, I think that confirms that it is not possibility 1 or 2).

Changing Kd into Ka unfortunately did not change anything.

However, the document that you sent is very relevant. There are also some interesting references mentioned on the last page I see, so I will dive into the topic a bit deeper and hopefully after that I am able to solve the issue.