Because it's wrong.
If you want to use ZTool, you have to write something like this:
Code:
pzlib+srep:m3f+lolz:dtb1:tt8:mt2:gm20:fba0:d128m
In your INI file it should look like this
Code:
[External compressor:pzlib]
header = 0
packcmd = _Compressors\ZTool\ZTool e:pzlib:max:t100p Input <stdout>
unpackcmd = _Compressors\ZTool\ZTool d:pzlib:t100p:cm0mb - - <stdin> <stdout>
datafile = Input
However you can name the compressor to what you want, just make sure unpack arc.ini is named as the same compressor. Also you're able to change the options directly in MMC line. To do this replace in your INI file
Code:
packcmd = _Compressors\ZTool\ZTool e:pzlib:max:t100p Input <stdout>
with this
Code:
packcmd = _Compressors\ZTool\ZTool e:{options} Input <stdout>
In MMC it should look like this then
Code:
MMC=pzlib:t100p+srep+........
Code:
MMC={ZTool Codec}:{Codec options}+.....