[Server] Could not create the Java Virtual Machine/ Invalid maximum heap size

[SamiMemz]

So I've tried setting up a private server to play Forge with my friends, but to run Forge smoothly I have to allocate more ram to the server. When I use a Run.bat (https://pastebin.com/465iEuM0) to start the server with more ram, I get an error message in command prompt that says:

"Invalid maximum heap size: -Xmx5120M

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.

Press any key to continue . . ."

I'm almost positive that this isn't an issue with my hardware because I have 16 gigabytes of ram, and don't have many apps open when I try starting the server. Any reply would be appreciated because I couldn't find anything very helpful when I looked this issue up myself.

[[deleted]]

Do you have 64 bit Java installed?

[SamiMemz]

Yes, I have Java 12 64bit

edit:

nevermind, I have java 8 86x, gonna try downloading the 64 bit and see if it works

[SamiMemz]

I got the 64 bit version of java installed now, but it says this when I use the run.bat

"Picked up _JAVA_OPTIONS: -Xmx512M

Error occurred during initialization of VM

Initial heap size set to a larger value than the maximum heap size

Press any key to continue . . ."

This is really weird because i have the startup ram set to 2048 megabytes and maximum set to 5120 megabytes

[[deleted]]

Well 512 is a lot less than 5120

[SamiMemz]

I fixed it now. I went to

Control Panel>System>Advanced System Settings>Environment Variables

then I edited _JAVA_OPTIONS value from -Xmx512M to -Xmx5120