JVM out of memory error on virtual machine

I'm using VMware to run virtual machines on a cluster of computers. The virtual machines have been compiled with MatLab defaults (preference and options) that I do not currently have access to. Can I find out the JVM heap size - not just the maximum memory being used by MatLab by executing commands in the program causing the error? If so what commands? the java.land.Runtime.getRuntime.maxMemory command does not seem to be correlated with the JavaMemHeapMax value. I'm running the 64-bit version of MatLab 2014a on windows 7 64-bit and loading C++ libraries to do some of the calculations. The error message from the virual machine log is ... beamsComputeTiledVolume: total elapsed time = 38.511601 Java exception occurred: java.lang.OutOfMemoryError: Java heap space domain_algo_doselib unloaded. 0959