On 5 May 2010 14:42, Dmitry Matveev <dmm1989 at gmail.com> wrote:
> Hi everybody!
>
> Could you please help me?
>
> I'm experiencing the following trouble: when I'm loading the Alien FFI (from
> the squeaksource or from the .mcz files manually) in Squeak 4.1, I'm getting
> the DNU expection Array>>createMethod:header:
>

This happens, when you using an obsolete way of encoding
a method's trailer - bytes instead of instance of CompiledMethodTrailer.

Here the fix:

MethodNode>>generate
	"The receiver is the root of a parse tree. Answer a CompiledMethod. The
	argument, trailer, is the references to the source code that is stored with
	every CompiledMethod."

+++	^self generate: CompiledMethodTrailer empty
---	^self generate: #(0 0 0 0)


Btw, this method is included by default in 4.1 images, and in pharo images,
which integrated new compiled methods trailers.
So, Alien don't needs to override this method anymore.

> The Alien-Prereq module was already loaded.
>
> May be I've missed some dependencies? Or Alien does not work with the 4.1
> and I should install an earlier version?
>


> Thanks,
> Dmitry
>



-- 
Best regards,
Igor Stasenko AKA sig.