Well use the generator image you can find on the pharo repo, it is hard to build such an image by hand.
This code: Primitives lookupDirectory: encodedPath filename: encodedBasename Should be: FilePluginPrims lookupDirectory: encodedPath filename: encodedBasename Now I don't why this was not correct (File management is pure magic to me). I would recommend you to post question about VMMaker not in this mailing list, because few people can answer here, but instead in the pharo-dev mailing list OR Squeak-vm-dev. Have fun with VMMaker 2013/11/29 Nicolai Hess <nicolaih...@web.de> > Looking at the code for DiskStore>>basicEntryAt: > I find this code: > "Primitives lookupDirectory: encodedPath filename: encodedBasename)" > What is this "Primitives" not a class? I am suprised there is some code > that I can not find the source for. > > Ok, it has something to do with vm primitives, and I know that code like > <primitive: 'primitiveDirectoryEntry' module: 'FilePlugin'> > is in the vmmaker-package for FilePlugin. > > BTW it is terrible hard to load vmmaker in a "normal" image. Now I use > the generator.image from pharo http://files.pharo.org/vm/src/. > But even in this image it is not possible to load the vmmaker tool. > > >