Increasing Java Heap Memory of target machine so that EXE runs on target machine with MCR

Dear All,

as writen in the title i am trying to increase or decrease the Java Heap Memory on a Target machine that has MCR. i already read this which i think is the answer for this question, but my problem that i am not finding the JavaMemHeapMax inside my MCR\Matlab.prf file. why is that? and how can i do this then?

Best Regards