I try to launch minecraft forge 38.0.1 (forge for minecraft 1.18) and get this error:

Exception in thread "main" java.lang.module.FindException: Module cpw.mods.securejarhandler not found, required by cpw.mods.bootstraplauncher
	at java.base/java.lang.module.Resolver.findFail(Resolver.java:893)
	at java.base/java.lang.module.Resolver.resolve(Resolver.java:192)
	at java.base/java.lang.module.Resolver.resolve(Resolver.java:141)
	at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:492)
	at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:298)
	at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:83)

I use JDK 17.0.0

I run with these settings:

executable file: C:\Program Files\Java\jdk-17\bin\javaw.exe

JVM arguments: -Xmx4G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M -XX:+IgnoreUnrecognizedVMOptions

"clean" game starts without any problems (also no problems with optifine)

Any ideas how to resolve this problem?

Thank you

 

Edited February 21, 20223 yr by nxbody
some improvement

Just updated to forge 39.0.79 (for minecraft 1.18.1) and have very similar error:

https://pastebin.com/0uKxxA6U

WARNING: Unknown module: cpw.mods.securejarhandler specified to --add-exports
WARNING: Unknown module: cpw.mods.securejarhandler specified to --add-opens
Exception in thread "main" java.lang.module.FindException: Module org.objectweb.asm.util not found, required by org.openjdk.nashorn
	at java.base/java.lang.module.Resolver.findFail(Resolver.java:893)
	at java.base/java.lang.module.Resolver.resolve(Resolver.java:192)
	at java.base/java.lang.module.Resolver.resolve(Resolver.java:141)
	at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:492)
	at java.base/java.lang.module.Configuration.resolveAndBind(Configuration.java:298)
	at cpw.mods.bootstraplauncher.BootstrapLauncher.main(BootstrapLauncher.java:137)