Hi. I just downloaded a minecraft server client for 1.12. I am running Windows 10. I put it into its's own folder and double clicked on it to start it but, when the command prompt came up it closed/vanished within a quarter of a second and the server did not open, it didn't create and files (i.e eula, properties, and whatever) at all. The folder was completely blank and the only thing that was there was the server launcher. I have downloaded different server versions for different versions of minecraft and they all did the same thing. I have tried so much with the command prompt like changing the directories, and nothing. My java is up to date, I downloaded java runtime, I made sure the server client opens with Java, and literally nothing has changed. I think I'm stumped. Help would be much appreciated. Thanks!