[ShivShubh]

Originally Posted by masen485

Thanks Razor12911

I tried the file and folder and extension that address

Just Cause 4\archives_win64\main/game0.arc

oo2core_7_win64.dll Rename oo2core_4_win64.d

game0.arc/oo2rec:
-----------------------------------------------------------------------------------
FreeArc 0.67 (March 15 2014) creating archive: data.arc
Compressed 1 file, 890,961,920 => 2,566,282,309 bytes. Ratio 288.04%
Compression time: cpu 0.75 sec/real 51.28 sec = 1%. Speed 17.37 mB/s
All OK

game0.arc/oo2recj:
-----------------------------------------------------------------------------------
FreeArc 0.67 (March 15 2014) creating archive: data.arc
Compressed 1 file, 890,961,920 => 890,962,140 bytes. Ratio 100.00%
Compression time: cpu 0.77 sec/real 6.07 sec = 13%. Speed 146.81 mB/s
All OK

Seems wrong to me, you aren't supposed to use oo2recj individually/separately on a file. You have to use oo2recj in combination with oo2rec. For example = arc a -moo2rec+oo2recj game0.test game0.arc