Hello,

 I am having problems with my forge setup everytime I do run client I keep getting the same crash message and cant find a fix. 

Cannot invoke "joptsimple.OptionSet.valueOf(joptsimple.OptionSpec)" because "this.optionSet" is null

I have tried reinstalling java, using cmd and intellij to runClient but nothing works and cant find a solution any help would be great thx.

 

2022-01-02 12:22:49,441 main WARN Advanced terminal features are not available in this environment
[12:22:49] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forgeclientuserdev, --version, MOD_DEV, --assetIndex, 1.18, --assetsDir, C:\Users\Aidan\.gradle\caches\forge_gradle\assets, --gameDir, ., --fml.forgeVersion, 39.0.9, --fml.mcVersion, 1.18.1, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20211210.034407]
[12:22:49] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 9.0.17+9.0.17+main.3e5b8360 starting: java version 17.0.1 by Eclipse Adoptium
[12:22:49] [main/DEBUG] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Found launch services [fmlclientdev,forgeclient,minecraft,fmlserveruserdev,fmlclient,fmldatauserdev,forgeserverdev,forgeserveruserdev,forgeclientdev,forgeclientuserdev,forgeserver,forgedatadev,fmlserver,fmlclientuserdev,fmlserverdev,forgedatauserdev,testharness]
[12:22:49] [main/DEBUG] [cp.mo.mo.NameMappingServiceHandler/MODLAUNCHER]: Found naming services : [srgtomcp]
[12:22:49] [main/DEBUG] [cp.mo.mo.LaunchPluginHandler/MODLAUNCHER]: Found launch plugins: [mixin,eventbus,object_holder_definalize,runtime_enum_extender,capability_token_subclass,accesstransformer,runtimedistcleaner]
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "joptsimple.OptionSet.valueOf(joptsimple.OptionSpec)" because "this.optionSet" is null
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ArgumentHandler.lambda$setArgs$0(ArgumentHandler.java:46)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:52)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.api.TypesafeMap.computeIfAbsent(TypesafeMap.java:47)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Environment.computePropertyIfAbsent(Environment.java:67)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.ArgumentHandler.setArgs(ArgumentHandler.java:46)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.run(Launcher.java:85)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.Launcher.main(Launcher.java:77)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:26)
	at MC-BOOTSTRAP/[email protected]/cpw.mods.modlauncher.BootstrapLaunchConsumer.accept(BootstrapLaunchConsumer.java:23)
	at [email protected]/cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:90)

 

I'm also experiencing this same issue. And it's happening to all of my 1.18.1 projects including ones that as recently as a couple days ago were working just fine.

Ok. Following up, I found the solution on the forge project discord. You need to use the command "gradlew --refresh-dependencies" 

Thank You So Much u saved hours of head banging.

 

Also never realized there was a discord

Having the same issue the refresh dependencies did not fix the problem though

 

 

EDIT: Got it 

Edited January 3, 20223 yr by themadcrafter