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Mod runs from IDE, but not JAR


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This is clearly a rookie problem, but I couldn't find any previous asking of it.


I have my mod working just fine when I launch from Eclipse, however when I build a JAR (which appears to have the right stuff in it) and put it in the mods folder, Forge passes it over without loading and says in the log:


[13:21:54] [main/DEBUG] [FML/]: Examining for coremod candidacy modid-1.0.jar
[13:21:54] [main/DEBUG] [FML/]: Not found coremod data in modid-1.0.jar


It seems I've missed something basic. Really appreciate if anyone could clue me in.



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Why are you making a coremod?


It wasn't my intention to modify core behaviour, just add a few items. My mod doesn't show up on the mods list when I load it from JAR, but does show up, and add the items I expect, when I launch from the IDE.


I'm thinking that I've missed a build flag or a resource that only matters when running the compiled code.

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I think I'm close to answering my own question. I have someone else's mod in there as well as control and it is getting loaded. In the FML log I notice that after it examines that mod it says:

[13:21:54] [main/TRACE] [FML/]: Found FMLCorePluginContainsFMLMod marker in BetterFoliage-mc1.8-1.1.4.jar, it will be examined later for regular @Mod instances

However it apparently hasn't found that marker in mine although I have the @Mod annotation since it doesn't say the same thing about


. So, I think I just need to figure out what that marker is it's looking for.


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If you are not making a coremod you do not need this.


OK, thanks. FML is looking at my JAR and deciding it doesn't contain a mod. So I'm still trying to figure out what I've missed. I see a subsequent load attempt which may illuminate the problem better:


[15:35:37] [Client thread/DEBUG] [FML/]: Examining file modid-1.0.jar for potential mods

[15:35:37] [Client thread/TRACE] [FML/]: Located mcmod.info file in file modid-1.0.jar

[15:35:37] [Client thread/WARN] [FML/]: Zip file modid-1.0.jar failed to read properly, it will be ignored


at net.minecraftforge.fml.common.MetadataCollection.parseModMetadataList(MetadataCollection.java:89) ~[MetadataCollection.class:?]

at net.minecraftforge.fml.common.MetadataCollection.from(MetadataCollection.java:72) ~[MetadataCollection.class:?]

at net.minecraftforge.fml.common.discovery.JarDiscoverer.discover(JarDiscoverer.java:55) [JarDiscoverer.class:?]

at net.minecraftforge.fml.common.discovery.ContainerType.findMods(ContainerType.java:42) [ContainerType.class:?]

at net.minecraftforge.fml.common.discovery.ModCandidate.explore(ModCandidate.java:71) [ModCandidate.class:?]

at net.minecraftforge.fml.common.discovery.ModDiscoverer.identifyMods(ModDiscoverer.java:131) [ModDiscoverer.class:?]

at net.minecraftforge.fml.common.Loader.identifyMods(Loader.java:348) [Loader.class:?]

at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:469) [Loader.class:?]

at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:208) [FMLClientHandler.class:?]

at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:412) [bsu.class:?]

at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:325) [bsu.class:?]

at net.minecraft.client.main.Main.main(SourceFile:120) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_55]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_55]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_55]

at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_55]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.11.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.11.jar:?]




And it has. Solved! Needed to clean up my mcmod.info modelling it after TGG's example: https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/resources/mcmod.info


diesieben07, thanks for helping me work through this!

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