Hi Alan, thank you for the idea. Actually, before writing to the registry, I looked for a way how to have a process ("process.start()") run in a particular culture... Couldn't find information on that, so the registry hack was my problem solver. Now I tried your code, but unfortunately I encounter a strange effect: The called tool starts executing, it also consumes my additional parameters (as I can see from the Console messages), but ... then it seems to stop on it's half way, the Console window stays open and nothing goes on anymore. This is different from my older experiments with "process.start()": Once the parameters (path etc.) were fed correctly, the tool just worked (with different results depending on the system culture setting). I have no idea what mightbe wrong now. Salut Mick