Why can't the "Read/Write Files from Disk" node save the file name dynamically?

[Bethena_Chan]

Maybe this is a very simple question. Thank you very much for your hard work.

[Michael_Rousseaux]

IT seems that you are on Windows. I’m on Linux, but, did you try with just your variable and take à look on the result ? Maybe the error will give you more information.

[Grot]

That’s weird. Try adding a property by pressing ad option. You should be able to force it by adding file name there aswell.