Code:
H:\Games\NieR - Automata>mcm -x ./ ../data.biyori
======================================================================
mcm compressor v0.83, by Mathieu Chartier (c)2015 Google Inc.
Experimental, may contain bugs. Contact mathieu.a.chartier********com
Special thanks to: Matt Mahoney, Stephan Busch, Christopher Mattern.
======================================================================
Error opening: ./ (UNIMPLEMENTED)
not recursive