[ESS] Aquamacs M-x R behaviour with R 3.0.0 (on Mac OS of course) - help request

[Alun Pope]

In the minbuffer after M-x R I get a message as before with R 2.15.x 
asking for a starting directory.

If I have an existing directory in there shown as the default, and hit RET 
I get a refresh and the same
message and directory, but no visible action.  If I put in a new directory 
name i get a [no match] 
message in the minibuffer.

It seems there is a *R* buffer created which reports:


ERROR: sub-architecture 'x86_64' is not installed

Process R exited abnormally with code 1 at Fri Apr 19 17:05:51 2013




The Aquamacs version is


This is Aquamacs Emacs, based on GNU Emacs,
one component of the GNU operating system.

Aquamacs is a distribution of GNU Emacs that is adapted for Mac users.

GNU Emacs 23.3.50.1 (i386-apple-darwin9.8.0, NS apple-appkit-949.54)
 of 2011-10-26 on braeburn.aquamacs.org - Aquamacs Distribution 2.4
Copyright (C) 2011 Free Software Foundation, Inc.


I DO have R 3.0.0 installed as this session run in the R.app shows:


R version 3.0.0 (2013-04-03) -- "Masked Marvel"
Copyright (C) 2013 The R Foundation for Statistical Computing
Platform: x86_64-apple-darwin10.8.0 (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.



The .Rprofile file is in ~/.Rprofile


[R.app GUI 1.60 (6476) x86_64-apple-darwin10.8.0]

[History restored from /Users/alun/.Rapp.history]



I would tell you the ESS version number if I could find it.  
But Aquamacs is up to date (according to 
itself).


Any pointers greatly appreciated!!   Thanks in advance.

[Apologies if it is not an ESS problem!]

Alun