Thanks a lot. I know my code is ugly; my colleague calls it "kindergarten code". I will take a look into the mentioned resources.

The sub READ_HISTORY is very shorten in this example. I use the variables global, as in the real tool there is also a current.csv and I work with the informations from both files global in the complete script.

I forced myself to add SUB in every sub as I started code with subs. It's redundant but for me it was much more easier to understand. I will force myself know to save four characters in every sub in future. ;-)

Again thanks a lot I spent at least two days try and error and also at least one day reading/searchin the net; You solved the problem within a few minutes!