ObfuscationReflectionHelper doesn't work on the client side of LAN connected players

[stepsword]

I'm constantly getting this error: 

The game crashed whilst unexpected error
Error: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToAccessFieldException: net.minecraftforge.fml.relauncher.ReflectionHelper$UnableToFindFieldException: java.lang.NoSuchFieldException: renderPosX

 

whenever I use ObfuscationReflectionHelper on the client (in several, unrelated classes).

 

I do not get this error on the client side of the world host, either, and the reflection always go through properly. Any ideas why it doesn't work in the specific case of a player connecting to the world and trying to do the reflection?

 

The fields in question were EntityArrow.inGround, and RenderManager.renderPosX. I had written off EntityArrow as something stupid with Arrows but then it happened again with the RenderManager.. the fields definitely exist, and both writes and reads fail.

 

Edit: Tried debugging it with no luck.. I was connecting from Twitch -> Debug when I got the error, but going from Debug -> Twitch didnt throw this error.. So not sure what that means

Edited September 20, 2019 by stepsword

[stepsword]

9 hours ago, diesieben07 said:

You need to specify the SRG name when using ObfuscationReflectionHelper for it to work outside the development environment.

OH. That explains a lot, thank you. I remember when I initially made that field, I saw someone else's code do p_12345 or something, but I assumed it was just patched to have the correct name in a later version of Forge.  Do you happen to know how I can find the actual name of the variable I'm looking for? i.e. the original class before de-obfuscation?

Edited September 20, 2019 by stepsword

[Draco18s]

MCP bot exports.

[stepsword]

1 hour ago, Draco18s said:

MCP bot exports.

Thanks for this - do you happen to know if 1.12 is sufficient for 1.12.2? I don't see any 1.12.2 on that site.

[Draco18s]

2 minutes ago, stepsword said:

Thanks for this - do you happen to know if 1.12 is sufficient for 1.12.2? I don't see any 1.12.2 on that site.

Should be, haven't looked at it in a while.

[stepsword]

59 minutes ago, Draco18s said:

Should be, haven't looked at it in a while.

Thanks - it looks like the latest snapshot has mostly the same mappings as the oldest snapshot so I guess it's the same throughout