I don’t think it is a bug in Processing as it works in my machine. It might be a bug in the OS. Ok, wait, I shouldn’t be talking bad about Windows. Let me put it in another way. The way I implemented was tested only on Win 10 OS and it is not guaranteed to work in other Windows OSes. I believe you have to do your own research to try to run it properly in Win 7. After all, my attempt above was my own research on my own time.
If I had a Win7 machine, I would give it a try and see if I could figure it out. Unfortunately, I do not own one.
Can you show how you were trying to do this in the command line when running your executable? Also, can you show your code that shows how you handle this file input by the user? For instance, are you using the selectInput() function?
Kf