Hi, The background to the question is that I'm trying to repackage LanguageBoxes so that both the Squeak and Pharo community can use its features (or just parts of it). Cutie-Helvetia defines a class, CURaisedToExample. Among others, it defines two methods: CURaisedToExample class >> #raise:to and CURaisedToExample >> testSplice. The latter makes use of QQCompiler's splice operation (just like Common Lisp's) - @foo will replace 'foo' with whatever 'foo' evaluates to, so compiling 'a := @(3 + 4)' means the same thing as 'a := 7'. Now testSplice says self assert: `@(self raise: 2 to: -3) = (1/8). which means that, _at_compile_time_, testSplice will invoke #raise:to: (the self refers to the class-side method)... and at this point in time #raise:to: has been compiled, but not installed. Compiling #testSplice fails with a MessageNotUnderstood, and package loading aborts. My question is this: how can I work around this? Can I move the installation of #raise:to: to a preload step? Some hacks that spring to mind, and don't seem very pleasant, are: * introduce a new superclass defining the method, put that in a seperate package, and load that package before Cutie-Helvetia * move the definition of CURaisedToExample and #raise:to: to a separate package, and make all the tests extensions to that package. frank