Please read the rules and FAQ before starting a new topic

Forge Doesn't Even Open

Posted September 6, 201411 yr

Every time I try to open forge I get this message:

[09:53:28] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[09:53:28] [main/INFO] [LaunchWrapper]: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
[09:53:28] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
[09:53:28] [main/INFO] [FML]: Forge Mod Loader version 7.10.25.1208 for Minecraft 1.7.10 loading
[09:53:28] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_20, running on Windows 8.1:amd64:6.3, installed at C:\Program Files\Java\jre1.8.0_20
[09:53:28] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[09:53:28] [main/INFO] [LaunchWrapper]: Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
[09:53:28] [main/INFO] [LaunchWrapper]: Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
[09:53:28] [main/ERROR] [LaunchWrapper]: Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20]
at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20]
at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?]
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future releas

can anyone help me?

Quote

September 6, 201411 yr

Author

ok, I have tried with 1.7.10 latest and recommended and the same thing happened.

I downloaded the newest version of pixelmon.

And I have not found anything that worked on any other posts.

Sorry if this isn't enough.

Quote

September 6, 201411 yr

Author

Oh I get it, I'm using Java 8. Sorry I didn't know my version. I'm not changing it because I have that version for a reason so I'll just wait. Thanks for the help. You can close this

Quote

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.

Reply to this topic...

https://forums.minecraftforge.net/topic/23035-forge-doesnt-even-open/

Followers

Go to topic listing

IPS spam blocked by CleanTalk.

Announcements

[1.16.1]Render enchanted glint to item

ik this was 5 years ago but is this the same in 1.20? or is there a different method?

By FireDude123 · Yesterday at 08:55 PM1 day
🎯 Elivius Needs You! Staff Wanted In All Positions! [Looking for Staff]

🌍 Elivius — Building a Legendary Minecraft Experience

Elivius is more than just a Minecraft server — it’s a vision. For years, our world has been in development, on and off, shaped by a small but passionate team. Now, we’re pushing forward with full force to create something unforgettable: a Towny-based survival experience enriched with custom quests, seasonal events, minigames, immersive builds, and unique features you won’t find anywhere else.

✨ Our Vision & Goals
Create a community-first server that feels alive, fair, and fun.
Build immersive seasonal events that keep players engaged year-round.
Develop custom content that brings personality and depth to Towny survival.
Grow Elivius into a credible, long-term project with transparency, quality, and heart.

We’ve already built the foundation, tested systems, and proven our resilience. Now, we’re looking for talented volunteers to join us and help Elivius become everything we know it can be.

⚒️ Recruiting Passionate Volunteers

Elivius is a volunteer project. While we don’t offer pay, we do provide:
🎁 Staff-exclusive giveaways (Nitro, rewards, in-game perks).
🏆 A chance to shape one of the most ambitious Towny servers.
💡 An opportunity to learn, grow, and leave your mark on something players will remember.
❤️ A welcoming, close-knit team that feels more like family.

We’re currently looking for:

🟦 Helper (Moderation Team)
Front-line moderators who answer questions, enforce rules, and keep the server safe and welcoming.

🟩 Builder
Creative builders who design spawns, event maps, and breathtaking seasonal builds.

🟨 Content Team
Configuration editors who bring features to life using plugins, resource packs, quests, menus, and systems.

🟦 Developer
Backend coders who create and maintain custom plugins, optimize performance, and bring new mechanics to life.

🟪 Media Team
Artists, editors, and designers who create graphics, trailers, animations, and promo content.

🟧 Content Creator
Streamers and YouTubers who help grow our player base. Creators get promotions and commissions on purchases through their codes.

🚀 Be Part of the Future of Elivius

We’re still small, but our ambitions are huge. With your help, we can turn Elivius into a legendary community where players feel at home and excited to return.

📌 All requirements are currently waived to help motivated applicants get started.
💬 Join our Discord and apply in the #staff-applications channel today!
👉 https://discord.gg/4HBU5tBDqc

Elivius wants YOU. Let’s build something unforgettable, together.

By AidenJules_ · Posted Yesterday at 03:58 AM1 day
[1.21.3] How to add effects to food?

game changed the way you create foods.
for example minecraft 1.21.8 code for the golden apple is

Foods.java
public static final FoodProperties GOLDEN_APPLE = new FoodProperties.Builder().nutrition(4).saturationModifier(1.2F).alwaysEdible().build();

Items.java
public static final Item GOLDEN_APPLE = registerItem("golden_apple", new Item.Properties().food(Foods.GOLDEN_APPLE, Consumables.GOLDEN_APPLE));

Consumables.java
public static final Consumable GOLDEN_APPLE = defaultFood() .onConsume( new ApplyStatusEffectsConsumeEffect( List.of(new MobEffectInstance(MobEffects.REGENERATION, 100, 1), new MobEffectInstance(MobEffects.ABSORPTION, 2400, 0)) ) )

By LordCambion · Saturday at 01:38 PM2 days
Is this forum active?

hello everyone..!

By WinX · Saturday at 06:47 AM2 days
How to add my mob to another mod's biome in 1.20.1.

tysm

By ilov3gam3z · Friday at 06:05 PM3 days

There are no registered users currently online

Sign In

Forge Doesn't Even Open

Featured Replies

Join the conversation

Posts

[1.16.1]Render enchanted glint to item

🎯 Elivius Needs You! Staff Wanted In All Positions! [Looking for Staff]

[1.21.3] How to add effects to food?

Is this forum active?

How to add my mob to another mod's biome in 1.20.1.

Who's Online (See full list)

Important Information

Account

Navigation

Search

Configure browser push notifications

Chrome (Android)

Chrome (Desktop)

Safari (iOS 16.4+)

Safari (macOS)

Edge (Android)

Edge (Desktop)

Firefox (Android)

Firefox (Desktop)