Error in launch.json under Windows 10

[Termiiii]

the following code does not work for me under Windows 10 with Visual Studio Code:

"args": ["<${fileDirname}//input.txt", ">${fileDirname}//output.txt"],

This works though:

"args": ["<", "${fileDirname}\\input.txt", ">", "${fileDirname}\\output.txt"],