GM commands do not work via the L2Net console, thus you can't use OOG if that is what you tried. If you use L2Net IG version, you can use gm commands via the L2 client itself just fine.
So IG 1.78 works fine in interlude on official with the good old l2asrv 0.51.
Has anyone had any luck getting OOG 10.8.3 to work via needle etc? If so, any hints as to how? TIA!