[R] error (code 12)

[khazaei at ceremade.dauphine.fr]

Hi,
I am runing R on my  mac and  I  get this error:

R(206,0xa01ad720) malloc: *** mmap(size=4000002048) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
R(206,0xa01ad720) malloc: *** mmap(size=4000002048) failed (error code=12)
*** error: can't allocate region
*** set a breakpoint in malloc_error_break to debug
Is there any an easy way to overcome this error?

Any help or information would be great, thanks
I am using  Mac OS X 10.5.8.

Khazaei