my minecraft 1.12.2 forge keeps on crashing on start up?

[Thomas2262]

here is the log if it helps at all

07:56:50.214
Preparing to launch minecraft client for 1.12.2-forge1.12.2-14.23.5.2768
07:56:50.215
Prepared asset index
07:56:50.231
Have 1346 total files to check or download
07:56:50.236
Waiting for 1346 futures
07:56:50.838
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/net/minecraftforge/forge/1.12.2-14.23.5.2768/forge-1.12.2-14.23.5.2768.jar
07:56:50.838
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\net\minecraftforge\forge\1.12.2-14.23.5.2768\forge-1.12.2-14.23.5.2768.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.150
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/com/typesafe/akka/akka-actor_2.11/2.3.3/akka-actor_2.11-2.3.3.jar
07:56:51.151
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\com\typesafe\akka\akka-actor_2.11\2.3.3\akka-actor_2.11-2.3.3.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.366
Couldn't fetch SHA1 checksum for https://s3.amazonaws.com/Minecraft.Download/versions/1.12.2/1.12.2.jar
07:56:51.367
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\versions\1.12.2\1.12.2.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.485
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-actors-migration_2.11/1.1.0/scala-actors-migration_2.11-1.1.0.jar
07:56:51.486
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-actors-migration_2.11\1.1.0\scala-actors-migration_2.11-1.1.0.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.567
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/com/typesafe/config/1.2.1/config-1.2.1.jar
07:56:51.567
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\com\typesafe\config\1.2.1\config-1.2.1.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.722
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-compiler/2.11.1/scala-

07:56:51.770
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\plugins\scala-continuations-library_2.11\1.0.2\scala-continuations-library_2.11-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:51.935
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/plugins/scala-continuations-plugin_2.11.1/1.0.2/scala-continuations-plugin_2.11.1-1.0.2.jar
07:56:51.936
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\plugins\scala-continuations-plugin_2.11.1\1.0.2\scala-continuations-plugin_2.11.1-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.026
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-library/2.11.1/scala-library-2.11.1.jar
07:56:52.028
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-library\2.11.1\scala-library-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.044
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-parser-combinators_2.11/1.0.1/scala-parser-combinators_2.11-1.0.1.jar
07:56:52.044
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-parser-combinators_2.11\1.0.1\scala-parser-combinators_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.155
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-reflect/2.11.1/scala-reflect-2.11.1.jar
07:56:52.156
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-reflect\2.11.1\scala-reflect-2.11.1.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.320
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-swing_2.11/1.0.1/scala-swing_2.11-1.0.1.jar
07:56:52.321
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-swing_2.11\1.0.1\scala-swing_2.11-1.0.1.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.369
launcher
main
Couldn't fetch SHA1 checksum for http://files.minecraftforge.net/maven/org/scala-lang/scala-xml_2.11/1.0.2/scala-xml_2.11-1.0.2.jar
07:56:52.370
launcher
main
Have local file C:\Users\Liz\AppData\Roaming\.minecraft\libraries\org\scala-lang\scala-xml_2.11\1.0.2\scala-xml_2.11-1.0.2.jar but don't know what size or hash it should be. Have to assume it's good.
07:56:52.900
launcher
main
Checking installations.
07:56:52.901
launcher
main
Minecraft client 1.12.2-forge1.12.2-14.23.5.2768 is ready to start.
07:56:52.901
launcher
main
Starting!
07:56:52.901
launcher
main
Nothing to download!
07:56:52.901
launcher
main
Extracting 3 files!

07:56:53.172
launcher
main
Version does not support log configuration, will assume one plaintext entry per line
07:56:53.172
launcher
main
Installing versions!
07:56:54.072
game
[07:56:54] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
07:56:54.080
game
[07:56:54] [main/INFO] [LaunchWrapper]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
07:56:54.083
game
[07:56:54] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
07:56:54.101
game
[07:56:54] [main/INFO] [FML]: Forge Mod Loader version 14.23.5.2768 for Minecraft 1.12.2 loading
07:56:54.101
game
[07:56:54] [main/INFO] [FML]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_51, running on Windows 10:amd64:10.0, installed at D:\minecraft\runtime\jre-x64
07:56:54.204
game
[07:56:54] [main/INFO] [FML]: Searching C:\Users\Liz\AppData\Roaming\.minecraft\mods for mods
07:56:54.205
game
[07:56:54] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
07:56:54.206
game
[07:56:54] [main/INFO] [LaunchWrapper]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
07:56:54.207
game
[07:56:54] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
07:56:54.209
game
[07:56:54] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
07:56:54.209
game
[07:56:54] [main/INFO] [LaunchWrapper]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
07:56:55.173
game
[07:56:55] [main/FATAL] [FML]: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty.
07:56:55.179
game
[07:56:55] [main/ERROR] [LaunchWrapper]: Unable to launch
07:56:55.179
game
java.lang.RuntimeException: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty, your vanilla jar may be corrupt.
07:56:55.179
game
at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:168) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraft.launchwrapper.Launch.launch(Launch.java:115) [launchwrapper-1.12.jar:?]
07:56:55.179
game
at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]

07:56:55.179
game
Caused by: java.lang.RuntimeException: Patcher expecting non-empty class data file for net.minecraft.crash.CrashReport$1, but received empty, your vanilla jar may be corrupt.
07:56:55.179
game
at net.minecraftforge.fml.common.patcher.ClassPatchManager.applyPatch(ClassPatchManager.java:113) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.common.patcher.ClassPatchManager.getPatchedResource(ClassPatchManager.java:76) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.getFieldType(FMLDeobfuscatingRemapper.java:219) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.parseField(FMLDeobfuscatingRemapper.java:192) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.common.asm.transformers.deobf.FMLDeobfuscatingRemapper.setup(FMLDeobfuscatingRemapper.java:161) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.common.asm.FMLSanityChecker.injectData(FMLSanityChecker.java:187) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
at net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper.injectIntoClassLoader(CoreModManager.java:163) ~[forge-1.12.2-14.23.5.2768.jar:?]
07:56:55.179
game
... 2 more
07:56:55.180
game
Exception in thread "main" [07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]: net.minecraftforge.fml.relauncher.FMLSecurityManager$ExitTrappedException
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraftforge.fml.relauncher.FMLSecurityManager.checkPermission(FMLSecurityManager.java:49)
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.SecurityManager.checkExit(SecurityManager.java:761)
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.Runtime.exit(Runtime.java:107)
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at java.lang.System.exit(System.java:971)
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraft.launchwrapper.Launch.launch(Launch.java:138)
07:56:55.199
game
[07:56:55] [main/INFO] [STDERR]: [java.lang.ThreadGroup:uncaughtException:1052]:     at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
07:56:55.249
monitor
Process Monitor
Process crashed with exit code 1

 

[Thomas2262]

im using forge
and i installed it just like any other forge version

[Thomas2262]

i don't even have any mods installed

[Thomas2262]

Just now, diesieben07 said:

Can you please explain this...?

i did it this way

[Thomas2262]

3 minutes ago, diesieben07 said:

Wow.

It's amazing to me that people still need a tutorial for double-clicking a file.

 

Go to .minecraft/versions and delete the 1.12.2 folder. Then try again.

omg it worked
thank you so much