[13:20:51] [main/INFO] [GradleStart]: No arguments specified, assuming client.
[13:20:52] [main/INFO] [GradleStart]: Extra: []
Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\t\.gradle\caches\minecraft\assets\virtual\legacy\indexes\legacy.json
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at GradleStart.setupAssets(GradleStart.java:260)
at GradleStart.startClient(GradleStart.java:82)
at GradleStart.main(GradleStart.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.io.FileNotFoundException: C:\Users\t\.gradle\caches\minecraft\assets\virtual\legacy\indexes\legacy.json
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:131)
at java.io.FileReader.<init>(FileReader.java:72)
at GradleStart.loadAssetsIndex(GradleStart.java:266)
at GradleStart.setupAssets(GradleStart.java:204)
... 7 more

 

For some reason the 1.7.10-Latest(10.13.0.1179) version works fine but Forge 10.12.1.1112 gives me this exception.

 

I tried running gradlew setupDecompWorkspace but that doesn't work.

Having the same issue today. Tried clean + setupDecompWorkspace, without results.

Got a similar one.

Tried a lot o different versions.

Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: C:\Users\VTM\.gradle\caches\minecraft\assets\indexes\{ASSET_INDEX}.json (The system cannot find the file specified)
at com.google.common.base.Throwables.propagate(Throwables.java:160)
at GradleStart.setupAssets(GradleStart.java:260)
at GradleStart.startClient(GradleStart.java:82)
at GradleStart.main(GradleStart.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)
Caused by: java.io.FileNotFoundException: C:\Users\VTM\.gradle\caches\minecraft\assets\indexes\{ASSET_INDEX}.json (The system cannot find the file specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.io.FileReader.<init>(FileReader.java:72)
at GradleStart.loadAssetsIndex(GradleStart.java:266)
at GradleStart.setupAssets(GradleStart.java:204)
... 7 more

Process finished with exit code 1

 

Edit:

Running just

gradlew setupDecompWorkspace

Fixed it!

No need to clean before.