Is there a way to show the "You don't have mod X of version Y" screen when loading mods, such that state detection not related to things Forge can see (cough, a mod not reporting a version number) and display a message to the user about the missing requirement?

 

I'd much prefer to do that than throw an IllegalStateException and crash the game.

There are ways to throw custom errors with custom GUIs.

However, why is the mod not reporting a version number?

There are ways to throw custom errors with custom GUIs.

However, why is the mod not reporting a version number?

 

Its not mine, of course, but for some reason their @Mod annotation is missing the version number.  The file name contains it, but not the @mod or the mcmod.info file, so Fore assumes the version is 1.0 and given that some changes were made that my mod depends on, I can't directly say "I need Mod X version Y" in my dependencies, because Forge can't tell 1.0 ("1.2.15") apart from 1.0 ("1.2.18").

 

Because of this, I'm using Reflection to see if the classes I need exist, but I'm not sure how to prevent the game from successfully loading (because as soon as WorldGen happens, it'll crash).