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[Solved][1.6.4] Crashes while loading mods in a dev environment.


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I just started getting in to modding and was able to get forge set up properly and have run though a couple of tutorials no problem. For my first mod I wanted to make a small Tinker's Construct addon but I am having issues getting it set up. Minecraft crashes whenever it tries to load any mods. I've tried others besides TConstruct but always get same or similar errors.


Here is the message I am seeing

2014-01-11 21:28:37 [sEVERE] [ForgeModLoader] Caught exception from TConstruct java.lang.NoSuchFieldError: field_71973_m


Here are the steps I've taken.

1. Download the forge source and run the install command.

2. Run Minecraft from Eclipse to test.

3. Copy mod's jar file to the mcp/jars/mods folder.

4. Run Minecraft again, console shows forge trying to load the mods but then crashes.


I have also tried adding the mod as an external jar in Eclipse by adding it as a library in the build path. But it has the same result.


Here is my client-0.log,



Some notes for clarity,

The game is being run from Eclipse, not the forge universal binary

I am not trying to add any dev libraries at this point just a binary jar as a player would.

Other mods I have tried are Buildcraft and Thermal Expansion, both have the same problem.

I have loaded these mods no problem using the current forge universal


Likely there is a simple fix, but there were just to many search results about loading mods with the universal binary rather than in a dev environment.






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You can also run Bearded Octo Nemesis to deobfuscate the mod and you can put it in the mods folder.

Don't PM me with questions. They will be ignored! Make a thread on the appropriate board for support.


1.12 -> 1.13 primer by williewillus.


1.7.10 and older versions of Minecraft are no longer supported due to it's age! Update to the latest version for support.



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I am going with the CodeChickenCore solution for now as it is simpler.


This.  It's really cool and very valuable.

Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable.  If you think this is the case, JUST REPORT ME.  Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice.


Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked.


DO NOT PM ME WITH PROBLEMS. No help will be given.

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