In a 3.9a-Packages image, I installed VMMaker, installed OSProcess, tried to generate the plugin, and got an error in MessageNode>>asTranslatorNode. This worked after I changed
sel _ (selector isSymbol) ifTrue: [selector] ifFalse: [selector key].
into:
sel _ (selector isMemberOf: Symbol) ifTrue: [selector] ifFalse: [selector key].
I would guess that selector was a ByteSymbol, instead of the expected Symbol, because of the internationalization changes.
BTW, VMMaker does not have a category in Mantis. BTW, I'd send a patch, but OSProcessPlugin inconveniently installs itself in a VMMaker category.
Daniel Vainsencher