[ESS] Problem interrupting an R process

[Dylan Childs]

I have recently started using ESS with the carbon version of Emacs 
compiled for Mac OS X (v 10.3.9). I run a lot of long simulations in R 
and frequently need to interrupt  a running R process (associated with 
the iESS mode) when developing code. My problem is that the ESS 
supplied interface for this (BREAK via C-c C-c or via the menu for 
example) frequently causes Emacs to hang. This also occurs if I issue 
the same (BREAK) command when R is sitting idle. Does anyone know if 
this is a known problem? It is rather frustrating as I can't really use 
ESS mode as I would like to at the moment and it is so useful in all 
other respects.

Many Thanks

Dr. Dylan Z. Childs
Department of Animal and Plant Sciences,
University of Sheffield,
Sheffield,
S10 2TN, UK.
Tel  (+44) (0)114 222 0057
Fax (+44) (0)114 222 0002