I am using JMeter 2.11. The following parameters are defined in the jmeter.bat file :
set HEAP=-Xms512m -Xmx12144m set PERM=-XX:PermSize=64m -XX:MaxPermSize=64m
I believe that in the "set HEAP=-Xms512m -Xmx12144m " both values need to be the same. I think that if you would try with "set HEAP=-Xms2048m -Xmx2048m " the error will be gone.