Error on Undertale new update

[rma1994]

Hello Mika Attila!
I'm from Brazil and I'm using GMKTool to translate Undertale to Brazilian Portuguese, via TranslaTale.
So, today (01/20/2015) Tobby Fox launched an update for the game. On this one, GMKtool stop working.
When I try to unpack the strings it throws the following error:
"Failed to load game data for "F:\Program Files\Steam\steamapps\common\Undertale\data.win": Unexpected chunk type: ,♫ ([44, 14, 0, 0])"

Thank you for this great tool, it really help a tone! :D

[PoroCYon]

Can confirm, this happens because there is a new bytecode version (0xF), see this on /r/Underminers. My decompiler can already read the ReferenceDefs, but not the bytecode itself the new bytecode format.

[crumblingstatue]

I'll investigate this as soon as I can, I don't have the updated Undertale yet.

[rma1994]

If needed I can provide you the game data :)

[crumblingstatue]

Looks like this error is caused by the OPTN chunk having a different (smaller) size than the previous version. My current implementation assumes it always has the same size.

I'm not sure how to solve this, as I haven't analyzed the OPTN chunk thoroughly. I might take a look at how @PoroCYon's implementation handles it.

[crumblingstatue]

Well... I took a closer look, and it seems that my library doesn't even expose a public interface to manipulate the contents of the OPTN chunk, so I think I'll treat it as a black box for now. Hopefully that will solve this issue.

[crumblingstatue]

Actually, the OPTN chunk contains pointers into other chunks that need to be updated, so treating it as a black box is not an option.

[crumblingstatue]

It seems that the new Undertale version is compiled with a different (seemingly older) version of Game Maker, which does various things differently.

It seems that I will have to analyze this different format, and add support for it, while maintaining support for the other format, so gmktool can work with both versions of Undertale.

This sounds like a lot of work, so it might take a while to implement.

Help would be appreciated, although I guess not many people are familiar with game maker data files or Rust.

[rma1994]

I wish I could help, but I don't know nothing about Rust or game maker data files. :/
Maybe @PoroCYon could help you.
PoroCYon also made a topic on reddit, where he posted the following (it could be useful, idk):
https://gist.github.com/PoroCYon/45f947d576f715de3a4d

[Radu13]

crumblingstatue, i have the same error using it for data.win file of AM2R
You can check it?