Going off this, I believe it's the same issue. Downloaded java 9, but java 8 was still installed. attempted to open my 1.12.2 server with the batch, [ java -Xms5120M -Xmx5120M -jar -d64 "forge-1.12.2-14.23.0.2546-universal.jar" nogui ] and the cmd opens for a moment then closes. (Was difficult to capture this image due to it) I had tried removing java 8 to see if there was a conflict with having both, but after more searching found this, and redownloaded 8 (and uninstalled 9 temporarily). However, now the cmd window doesn't even come up fully before closing again. No error logs and no text displayed on the very brief window. I tried installing the server in a new folder with a fresh installer, and the vanilla server loads, but when attempting the server from the new location, the same thing happens. Any help is appreciated, as I am unable to find anything anywhere else.