UltraARC for Inno Setup (Conversion Tool)

[Simorq]

Well this is a problem for small files


This setting resolves the issue.

Config0.txt

[External compressor:rep,mm,delta,exe,exe2,4x4,lzma]
header = 0
packcmd   = FAZip64 -i0 compress:{compressor}{:option} $$arcdatafile$$.tmp - <stdout>
unpackcmd = FAZip64 -i0 decompress:{compressor}{:option} <stdin> <stdout>

[External compressor:lzma2,Lzma2,LZMA2,xz,XZ]
header = 0
packcmd   = 7z a -txz -an -mcrc=0 -m1=lzma2:d25:fb=273:mf=bt4:mc=1000000:lc=4:lp=0 -mmt=on -mx9 -so $$arcdatafile$$.tmp <stdout>
unpackcmd = 7z x -txz -mmt=on -an -y -si -so <stdin> <stdout>