StepTalk and object construction.

[Matthew D Swank]

I originally posted this to gnu.gnustep.help; however this list seems to
get a bit more traffic.
------------------------------------------------------------
(Note I am using cvs -q -d
":ext:anoncvs@savannah.gnu.org:/cvsroot/gnustep" update -dP -D 20041203
gnustep/dev-libs/StepTalk)

I tried the following example code from ESUG2003 slides:
| object method source engine |
  object := STScriptObject scriptObject.
  engine := STEngine engineForLanguageWithName:'Smalltalk'.

  source := 'sayHi Transcript show: \'Hi.\'. ^self'.
  method := engine methodFromSource:source
                   forReceiver:object
                   inEnvironment:Environment.

  object addMethod:method.
  object sayHi.

with stexec and I receive the error:
"stexec: Uncaught exception STInterpreterGenericException, reason: No 
execution environment set"

I can get the method to execute 'manually' by using 
"executeMethod:forReceiver:withArguments:inEnvironment:".
Why can't I get it to work as written?

Thanks,

Matt