It seems that on windows the size of the image by default is limited to 500MB in RAM. I don't know if you can change it or not. Linux/Mac is limited to 2GB. Can you try your experiments on a Mac? -- View this message in context: http://forum.world.st/cogwin-Croquet-Win7-Moose-very-large-models-crash-out-of-Memory-tp4328688p4328761.html Sent from the Pharo Smalltalk mailing list archive at Nabble.com.