Minecraft Forge 1.7.10 will not start [closed]

Minecraft Forge 1.7.10 will not start [closed] - White Mug on Red Background

My minecraft will not start on only that version, I have a Windows 7 computer with Java 8u20 installed, because the latest java 7 update will not work at all(plus imma dev for other stuff).

 [22:26:39] [main/INFO] [LaunchWrapper]: Loading tweak class name 
 cpw.mods.fml.common.launcher.FMLTweaker
 [22:26:39] [main/INFO] [LaunchWrapper]: Using primary tweak class name 
 cpw.mods.fml.common.launcher.FMLTweaker
 [22:26:39] [main/INFO] [LaunchWrapper]: Calling tweak class 
 cpw.mods.fml.common.launcher.FMLTweaker
 [22:26:40] [main/INFO] [FML]: Forge Mod Loader version 7.10.25.1208 for Minecraft 
 1.7.10 loading
 [22:26:40] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 
 1.8.0_20, running on Windows 7:amd64:6.1, installed at C:\Program 
 Files\Java\jre1.8.0_20
 [22:26:40] [main/INFO] [LaunchWrapper]: Loading tweak class name 
 cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
 [22:26:40] [main/INFO] [LaunchWrapper]: Loading tweak class name 
 cpw.mods.fml.common.launcher.FMLDeobfTweaker
 [22:26:40] [main/INFO] [LaunchWrapper]: Calling tweak class 
 cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
 [22:26:40] [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 release


Best Answer

DarkDestry is right but it only works for 1.7.2 on my computer.

Download Java 7 again: http://java.com/en/download/manual_java7.jsp

Then edit the profile and tick the advanced java option and change the line with this: C:\Program Files (x86)\Java\jre7\bin\javaw.exe

Execute!

*If Java 7 URL Doesn't work use this one (Maybe since April 2015):
http://www.oracle.com/technetwork/java/javase/archive-139210.html




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Minecraft Forge 1.7.10 will not start [closed] - Knitted piece and yarn with hook
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How do I fix Minecraft Forge not opening?

What can I do if Minecraft Forge is not installing properly?
  • Update Minecraft Java to the latest version. Open your Minecraft Launcher app. ...
  • Restart your internet router. ...
  • Reinstall Java. ...
  • Uninstall Minecraft completely. ...
  • Disable Windows Defender Firewall. ...
  • Install Minecraft Forge via PowerShell. ...
  • Reset Windows 10.


  • How do I get 1.7 10 Forge to work?

    How to install Minecraft Forge
  • Download Minecraft Forge at the official website. Make sure you double check your version, so you download the correct one. ...
  • Open the downloaded installer, which will bring up the installation process. ...
  • Open the Minecraft Launcher and change the profile to 'forge'.




  • How to Fix Minecraft forge crashing (QUICK AND EASY)




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    Images: Stas Knop, Anete Lusina, Skyler Ewing, Stas Knop