Rainbow 6 Siege compression errors

[CaptainMaelstrom]

Hi,
I've been trying to compress the Rainbow 6 Siege .forge files for a few days with variations of
afr:a2+srep_x64:m3f:a1:l256:c256:mem50%+4x4:b128mb :lzma:ultra:128m:bt4:fb273:lc8:mc1000000

I've tried changing:
d256m to lower values mainly d64
mc1000 to higher values mainly mc1000000 and mc10000000000
lzma without 4x4

I've tried compressing some of the .forge files individually but not all and they seemed to work fine, but I'm trying to compress 65 gb together, the compression starts fine, runs for about 30 minutes with offsets being listed and then suddenly fails with invalid/unknown compression method or parameters Errorlevel=-1
I am using ArcGUI and prior I was using diskspan but both have the same issue, could anyone help?