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I want (and actually have to) cerate a ZIP file using PPMd. This should be possible according to the manual of -m switch. However, that's what I receive:
$ 7z a -tzip -m0=ppmd test2.zipx test1.py
7-Zip  9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18
p7zip Version 9.20 (locale=en_US.utf8,Utf16=on,HugeFiles=on,2 CPUs)
Creating archive test2.zipx
Any ideas or tips? I can't use other software or other format.
Works perfectly :) Thank you very much.