Cant install M2TW

[Vevinr]

About halfway through the process near the end of disk 1 i get this message

Feature transfer error

Feature: Packs
Component: Packs
File: E:\main\packs\data_3.pack
Error: Incorrect function

Not sure what to do, have installed the game before and had no problems then

[DaLeGiOnArY]

Take your game back to the retailer,and ask for another copy. It looks like on of the files is f!!ced up.

[Vevinr]

i probably wont be able to return it as the purchase was made a year ago, problem only arose when i tried to re-install the game.

[ETG]

Yeah thats happeed to me but with datapack0.

The strange thing is that I had installed it before up to changing the 2nd disk but I accidentally closed it, can anyone help?