When trying the simple example (ls -la /Users) in Pharo 6.1 64bit you get a talkback because ExternalAddress integerAt:put:size:signed: fails using 'primitiveFFIIntegerAtPut' in module 'SqueakFFIPrims'
Something to do with OSSubprocess not accommodating 64 bit pointers perhaps? Same code works fine on 32bit version. VM is CoInterpreter VMMaker.oscog-eem.2254 Jul 20 2017 for macOS downloaded from pharo.org/downloaded page Regards, Jay+ -- Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
