I have read other topics and none of them have worked. I am entering java -Djava.net.preferIPv4Stack=true -jar forge-1.12.2-14.23.0.2491-universal.jar I am just getting the error message:
Unrecognized option: -jaraforge-1.12.2-14.23.0.2491-universal.jar
Error: Could not create the java virtual machine.
Error: a fatal exception has occurred. Program will exit.