Java Could not reserve enough space for object heap error
java, jvm, minecraft
Solution
Go to `Start` → `Control Panel` → `System` → `Advanced system settings` → `advanced(tab)` → `Environment Variables` → `System Variables` → `New`:
Variable name: _JAVA_OPTIONS
Variable value: -Xmx512M
Problem
I have Java7 running on 32-bit Windows and 4 GB RAM, but: ``` java -Xmx4G -Xms4G -jar Minecraft.jar java -Xmx3G -Xms3G -jar Minecraft.jar java -Xmx2G -Xms2G -jar Minecraft.jar ``` ...still does not work. Error: Error occurred during initialization of VM Could not reserve enough space for object heap Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit. `java -Xmx1G -Xms1G -jar Minecraft.jar` is working. Why?