Outside array bounds

[JoGaTo]

Got this While trying to decrypt the lastest game that came out:

V:\1177530>V:\1177530\CSystemArc.exe unpack V:\1177530\Arc02.dat V:\1177530\Arc05.dat V:\1177530\Arc05a.dat V:\1177530\Arc05b.dat V:\1177530\Arc05c.dat V:\1177530\Arc05d.dat etc Archive version: 23 Unpacking 000972 (type n0) Unpacking 000973 (type n0) Unpacking 000974 (type n0) Unpacking 000975 (type n0) Unpacking 000976 (type n0) Unpacking 000977 (type n0) Unpacking 000978 (type n0) Unpacking 000979 (type n0) Unpacking 000980 (type n0) Unpacking 000981 (type n0) Unpacking 000982 (type n0) Unpacking 000983 (type n0) Unpacking 000984 (type n0) Unpacking 000985 (type o0) Unpacking 000986 (type o0) Unpacking 000987 (type o0) Unpacking 000988 (type o0) Unpacking 000989 (type o0) Unpacking 000990 (type o0) Unpacking 000991 (type o0) Unpacking 000992 (type c0) Unpacking 000993 (type z0) Unpacking 000994 (type b0) Unpacking 000995 (type b0) Index was outside the bounds of the array.
any clue to get past this?