The (namespace-require 'scheme/base) worked fine.  Is there any advantage/disadvantage to using the private namespace as Eli suggested? <div class="gmail_quote">On Thu, Jul 3, 2008 at 1:19 PM, Eli Barzilay <<a href="mailto:eli@barzilay.org">eli@barzilay.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">On Jul  3, Robby Findler wrote: > This is not a bug. > > The top-level namespace (ie the part of the namespace that deals > with code outside modules) for the module language does not have any > bindings. You have to initialize it with some if you want to use > them. > > It would be better to avoid eval (as has been mentioned a few times > on this list) but on the assumption that eval is truely necessary, > try this: > >   #lang scheme >   (namespace-require 'scheme/base) >   (eval '((lambda (x) x) 1)) > > Without the second line, the third one won't work, but with it, it > does. </div>You can also use a private namespace  #lang scheme  (define ns (make-base-namespace))  (eval '((lambda (x) x) 1) ns) or even better, you can use the namespace of the current module:  #lang scheme  (define-namespace-anchor anchor)  (eval '((lambda (x) x) 1) (namespace-anchor->namespace anchor)) and you can even do this now:  #lang scheme  (define-namespace-anchor anchor)  (define c 1)  (eval '((lambda (x) x) c) (namespace-anchor->namespace anchor)) --          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:                  <a href="http://www.barzilay.org/" target="_blank">http://www.barzilay.org/</a>                 Maze is Life! </blockquote></div>