If I start my server, the console says: Invalid maximum heap size: -Xmx8G The specified size exceeds the maximum representable size. Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. This is my Start.bat Code: @Echo OFF "C:\Program Files (x86)\Java\jre1.8.0_144\bin\java.exe" -Xincgc -Xmx8G -XX:permSize=256m -XX:MaxPermSize=512m -jar spigot-1.8.7-R0.1-SNAPSHOT-latest.jar PAUSE I solved this by upgrading my java version to 64 bit EDIT by Moderator: merged posts, please use the edit button instead of double posting.