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  1. sorry for my poor english. search on the web i found this issue "java.lang.OutOfMemoryError: Java heap space" which was caused by JVM. the heap size of JVM is not enough to load my model or simulation results so that i got crash notification everytime(~98%). i use safemode to start petrasim, then i saw "-Xmx700m" at first line in black window. but i couldn't find where to change the setting to increase heap size of JVM. how to solve this problem? thanks~ about my project: 0.53million cell (model size:50km*50km*2km) ECO2N+TOUGH2-MP my petrasim version is 5.1.1710 =============== PetraSim Crash Log: 2011/5/21 下午 06:48:35 java.lang.OutOfMemoryError: Java heap space at java.util.concurrent.ConcurrentHashMap$EntrySet.iterator(Unknown Source) at vtk.vtkGlobalJavaHash.GC(vtkGlobalJavaHash.java:54) at vtk.vtkJavaGarbageCollector$1.run(vtkJavaGarbageCollector.java:44) at java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source)