Reskin Help...

BlueArmadillo

FirstBus Veg
Mar 19, 2017
29
Hello all,
I am making a TFL Rail reskin for the 313 and I cant seem to get it to convert to a .TcGcPx file.
I have followed the instructions RSBin tool provides but it says it's the incorrect DDS type even though it isn't.
Could anybody help?

Kind Regards,
Blue Armadillo