[1.16.*] Run Client/Server error

[Luis_ST]

I had to reinstall my IDE because it got hung up, but now when I try to run client / server I get an error message:

I had this error before the reason was the lib version of the project, because Java 15 removed the NashornScriptEngineFactory,

I think, but the library of my project is version 1.8, I have already reimported the project, changed the java version but I get always the same error.

Exception in thread "main" [11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: java.lang.NoClassDefFoundError: jdk/nashorn/api/scripting/NashornScriptEngineFactory
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.coremod.CoreModEngine.loadCoreMod(CoreModEngine.java:48)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.coremod.CoreModProvider.addCoreMod(CoreModProvider.java:12)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:274)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1625)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.fml.loading.LoadingModList.addCoreMods(LoadingModList.java:85)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.fml.loading.moddiscovery.ModDiscoverer.discoverMods(ModDiscoverer.java:129)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.fml.loading.FMLLoader.beginModScan(FMLLoader.java:215)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.fml.loading.FMLServiceProvider.runScan(FMLServiceProvider.java:107)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.TransformationServiceDecorator.runScan(TransformationServiceDecorator.java:114)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.TransformationServicesHandler.lambda$runScanningTransformationServices$8(TransformationServicesHandler.java:115)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:271)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.HashMap$ValueSpliterator.forEachRemaining(HashMap.java:1766)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.TransformationServicesHandler.runScanningTransformationServices(TransformationServicesHandler.java:116)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:63)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.Launcher.run(Launcher.java:76)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1048]: 	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:105)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: Caused by: java.lang.ClassNotFoundException: jdk.nashorn.api.scripting.NashornScriptEngineFactory
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: 	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: 	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: 	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
[11:45:41] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1057]: 	... 33 more

 

[Luis_ST]

43 minutes ago, diesieben07 said:

However Forge has a recent update that should fix this.

a new mdk?

[Luis_ST]

12 minutes ago, diesieben07 said:

Yes, every Forge version comes with an MDK.

so i have to use 1.16.5 ?

[Luis_ST]

9 minutes ago, diesieben07 said:

You should be using 1.16.5 anyways, there is no point sticking with an older version.

And yes, if you want to use Java 15 you need to update.

so 1.16.5 dont need the NashornScriptEngineFactory