Hello, I'm on Pharo 6 (32 bit)/Windows 10 (64 bit). I'm trying to load and use the (32 bit) JVM DLL into a running Pharo image via the UFFI. Everything works correctly, including JVM method invocations, except when trying to set the minimum and maximum JVM heap size by passing the -Xms<size> and -Xmx<size> options upon JVM creation. With these options, Pharo simply crashes without leaving any trace. Apparently, memory management requests from the JVM interfere with Pharo's own memory management. Please note that we successfully use the same mechanism for both VisualWorks (32 bit)/Windows 10 (64 bit) and Gemstone 64 bit/Linux, so it seems it has to do with a Pharo limitation somehow. Further, I couldn't find any documentation on how to increase Pharo's working set. So the questions are: * What is the most probable cause of the crash described above? * Where is there more doc about Pharo's memory configuration settings? Greetings Raffaello