Hello. Today I need help again its about that 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. 7 months ago I buyed this (my new Computer) and first thing i did I made Tekkit Server 3.1.2 and it all worked well with out the errors this was the configuration on Launch.bat java -Xmx4G -Xms5G -jar Tekkit.jar nogui pause And I didnt have that error then I got bored then I deleted the server and today I was makeing the server then this error appears.... I know you will ask me did you reinstall java and Yes Yes i did , also you will ask me are you 34 or 64-bit and here is my PC (8 GB RAM , QuadCore , 64-bit) And Yes I installed java 64-bit but still dont get it why do I get this error now It was good 7 months ago and now It doesnt work what is wrong java or something. Please Help me and also Thank you for every reply.