I cannot patch the build.

[ghost]

I open multipatch. The first field is patchx.delta. THe seonc is my melee rom. I got it as Super Smash Bros. Melee (USA) (En,Ja) (Rev 2).nkit.iso. and the third field is my location. I press apply patch and it tells me this

What can cause this and how do i fix it ?

[neonfuz]

My guess is your melee iso isn't unmodified and uncompressed. How big is the iso? Have you tried doing a checksum of it?

[ghost]

That's entirely possible. It's 1,43 Gb. I don't even know what a checksum is. I'm really not that good at computer stuff