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[1.10.2] Crash when trying to load external mod in development environment

Quintinius

By Quintinius
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Quintinius Tree Puncher

Quintinius

Posted
Posted

I'm trying to develop a mod that depends on Realistic Terrain Generation (RTG) for terrain generation algorithms. My understanding is that, to load an external mod in the development environment, I can just place RTG's release jar into the /run/mods directory of my Eclipse workspace. According to some other forum threads I found, there used to be a problem with compatibility between obfuscated and deobfuscated versions of external mods, but apparently this has been changed in a recent version of Forge so that mods can be loaded whether or not they are obfuscated.

 

Unfortunately, when I try this with RTG, Minecraft crashes after postinitialisation with a NoClassDefFoundError. This happens whether or not I include its API in the /src/api source folder. I'm pretty sure it's not a problem with RTG, because there are already other mods that do the same thing - and with the same version of both Forge (12.18.2.2099) and RTG (4.1.2.4) - apparently without any problems. I don't really understand FML well enough to be able to tell how, though, and I couldn't find any similar threads on the forums.

 

Can anybody help?

 

Here's the stack trace:

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grexter Tree Puncher

grexter

Posted
Posted

I'm having similar issues with a bunch of other 1.10.2 mods (cofhcore, codechickencore, jei - all downloaded from trustworthy sites), the only one I got running so far is hwyla. I also found, that the mcp conf directory for the deobfuscator doesn't exist on my computer for 1.10.2.  Please help.

Quintinius Tree Puncher

Quintinius

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  On 4/4/2017 at 2:30 PM, grexter said:

I'm having similar issues with a bunch of other 1.10.2 mods (cofhcore, codechickencore, jei - all downloaded from trustworthy sites), the only one I got running so far is hwyla.

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I tried a few more mods as well, and got similarly inconsistent results - WorldEdit, for example, crashes with similar errors, but Chisel doesn't. And I can't see what RTG, JEI and WorldEdit have in common that Chisel and HWYLA don't.

 

  On 4/4/2017 at 2:30 PM, grexter said:

I also found, that the mcp conf directory for the deobfuscator doesn't exist on my computer for 1.10.2.  Please help.

Expand  

Not sure what you mean by this. Is it part of the same problem? If not, you might be better off starting a new thread for it.

HashtagShell Stone Miner

HashtagShell

Posted
Posted (edited)

Building against mods is just the case of getting the deobfuscated (deobf in short) mod file and adding it to the gradle compile configuration.

All files in /libs are added to that configuration automagically as far as I can remember.

 

Not sure about mods with a declared api.

Edited by HashtagShell
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Quintinius Tree Puncher

Quintinius

Posted
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Posted

Oh, I've got that far - my mod builds fine, and I can even compile it and run it (alongside RTG) in a normal Forge installation without any problems. What I'm having trouble with is getting RTG to run in the deobfuscated development environment. Sorry, I could probably have made that clearer in the first place.

jeffryfisher World Shaper

jeffryfisher

Posted
Posted

Beware of core mods (I saw the word  "core" in at least one of the mod names listed above). Forge doesn't play nice with other core mods, so you could still have problems even if you do everything "right".

The debugger is a powerful and necessary tool in any IDE, so learn how to use it. You'll be able to tell us more and get better help here if you investigate your runtime problems in the debugger before posting.

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