[pakrat2k2]

Yes, #Define Precomp "0.46MT" ;0.38, 0.40, 0.41, 0.42, 0.43, 0.46MT

missing from config0.txt

[External compressor:precomp]
header = 0
packcmd   = precomp -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp038]
header = 0
packcmd   = precomp038 -slow {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp038 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp040]
header = 0
packcmd   = precomp040 -slow {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp040 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp041]
header = 0
packcmd   = precomp041-slow {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp041 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp042]
header = 0
packcmd   = precomp042 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp042 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp043]
header = 0
packcmd   = precomp043 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp043 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp045]
header = 0
packcmd   = precomp045 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp045 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:Pcomp45]
header = 0
packcmd   = Pcomp45 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = Pcomp45 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:precomp046]
header = 0
packcmd   = precomp046 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = precomp046 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

[External compressor:Pcomp46]
header = 0
packcmd   = Pcomp46 -intense0 -c- {options} -o$$arcpackedfile$$.tmp  $$arcdatafile$$.tmp
unpackcmd = Pcomp46 -o$$arcdatafile$$.tmp -r $$arcpackedfile$$.tmp

otherwise it just failed immediately, without those in config0.txt