afni.nimh.nih.gov

I'm attempting to use the new 3dICA.R script on a 1.4 GB dataset and having a memory issue. My system has 6 GB or ram, most of which is free, yet the script fails to allocate a 1.4 GB vector. The error (which comes just after reading the parameter file) is as follows:

> Data <- read.AFNI(InFile)
Error in readBin(conbrik, "numeric", n = dx * dy * dz * dt * size, size = size, :
cannot allocate vector of length 1388707840
Calls: read.AFNI -> readBin
Execution halted

Thanks for any advice.