Basically, I downloaded the classic launcher to play a 3rd party pack, called "Hardcore Testing Mode: Golem Factory" (Link to modpack thread: https://forum.feed-the-beast.com/th...ne-hardcore-testing-mode-golem-factory.47997/)
When i try to open the modpack, he didn't open and show this in console:
Logging in...
Beginning authlib authentication attempt
successfully created YggdrasilAuthenticationService
Login complete.
Checking local assets file, for MC version 1.6.4 Please wait!
Error grabbing legacy java wrapper library: java.net.UnknownHostException: ftb.forgecdn.net
Setting up native libraries for Hardcore Testing Mode: Golem Factory v Recommended Version MC 1.6.4
Syncing Assets:
Java Path: C:\Program Files\Java\jre1.8.0_261\bin\javaw.exe
Pack: Hardcore Testing Mode: Golem Factory 1.6.4
Setting MinMemory to 256
Setting MaxMemory to 8128
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_261, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_261
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2021-01-04 14:57:28 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
MC process exited. return value: 0
[i18n] Added 0 enUS to options pane
[i18n] Added 1 cyGB to options pane
[i18n] Added 2 daDK to options pane
[i18n] Added 3 deDE to options pane
[i18n] Added 4 enGB to options pane
[i18n] Added 5 enUS to options pane
[i18n] Added 6 esES to options pane
[i18n] Added 7 fiFI to options pane
[i18n] Added 8 frCA to options pane
[i18n] Added 9 frFR to options pane
[i18n] Added 10 jaJP to options pane
[i18n] Added 11 itIT to options pane
[i18n] Added 12 maHU to options pane
[i18n] Added 13 nlNL to options pane
[i18n] Added 14 noNO to options pane
[i18n] Added 15 plPL to options pane
[i18n] Added 16 ptBR to options pane
[i18n] Added 17 ptPT to options pane
[i18n] Added 18 ruRU to options pane
[i18n] Added 19 svSE to options pane
[i18n] Added 20 zhCN to options pane
[i18n] Added 21 zhTW to options pane
[i18n] enUS English (US) language file loaded!
(Complete log: https://pastebin.com/L4W9CQm1)
When i try to open the modpack, he didn't open and show this in console:
Logging in...
Beginning authlib authentication attempt
successfully created YggdrasilAuthenticationService
Login complete.
Checking local assets file, for MC version 1.6.4 Please wait!
Error grabbing legacy java wrapper library: java.net.UnknownHostException: ftb.forgecdn.net
Setting up native libraries for Hardcore Testing Mode: Golem Factory v Recommended Version MC 1.6.4
Syncing Assets:
Java Path: C:\Program Files\Java\jre1.8.0_261\bin\javaw.exe
Pack: Hardcore Testing Mode: Golem Factory 1.6.4
Setting MinMemory to 256
Setting MaxMemory to 8128
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Loading tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Using primary tweak class name cpw.mods.fml.common.launcher.FMLTweaker
Jan 04, 2021 2:57:28 PM net.minecraft.launchwrapper.LogWrapper log
INFO: Calling tweak class cpw.mods.fml.common.launcher.FMLTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Forge Mod Loader version 6.4.49.965 for Minecraft 1.6.4 loading
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_261, running on Windows 10:amd64:10.0, installed at C:\Program Files\Java\jre1.8.0_261
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.DepLoader does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.core.launch.CodeChickenCorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod cofh.asm.LoadingPlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [WARNING] [ForgeModLoader] The coremod codechicken.nei.asm.NEICorePlugin does not have a MCVersion annotation, it may cause issues with this version of Minecraft
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Loading tweak class name cpw.mods.fml.common.launcher.FMLDeobfTweaker
2021-01-04 14:57:28 [INFO] [ForgeModLoader] Calling tweak class cpw.mods.fml.common.launcher.FMLInjectionAndSortingTweaker
2021-01-04 14:57:28 [SEVERE] [ForgeModLoader] Unable to launch
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.remove(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:114)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
MC process exited. return value: 0
[i18n] Added 0 enUS to options pane
[i18n] Added 1 cyGB to options pane
[i18n] Added 2 daDK to options pane
[i18n] Added 3 deDE to options pane
[i18n] Added 4 enGB to options pane
[i18n] Added 5 enUS to options pane
[i18n] Added 6 esES to options pane
[i18n] Added 7 fiFI to options pane
[i18n] Added 8 frCA to options pane
[i18n] Added 9 frFR to options pane
[i18n] Added 10 jaJP to options pane
[i18n] Added 11 itIT to options pane
[i18n] Added 12 maHU to options pane
[i18n] Added 13 nlNL to options pane
[i18n] Added 14 noNO to options pane
[i18n] Added 15 plPL to options pane
[i18n] Added 16 ptBR to options pane
[i18n] Added 17 ptPT to options pane
[i18n] Added 18 ruRU to options pane
[i18n] Added 19 svSE to options pane
[i18n] Added 20 zhCN to options pane
[i18n] Added 21 zhTW to options pane
[i18n] enUS English (US) language file loaded!
(Complete log: https://pastebin.com/L4W9CQm1)
