Aha - the current MacosX-Intel FSL download is only 32-bit, it's
about time we released a 64-bit one too - we'll try to sort that next
week. That will almost certainly solve your problem.

In the meantime, you could try placing the following in $FSLDIR/bin
(and make sure its executable):
http://www.fmrib.ox.ac.uk/~steve/ftp/film_gls
http://www.fmrib.ox.ac.uk/~steve/ftp/contrast_mgr

Cheers, Steve.



On 12 Apr 2007, at 19:23, Clare Kelly wrote:

> Hi all,
>
> I am trying to run analyse a fairly large (816 timepoints) dataset.
> I have 20 EVS, plus temporal derivatives, corresponding to several
> classes of event regressors, two error regressors and three block
> regressors (no temp. derivative included). I'm using 3 column
> format EVs with the double-gamma HRF convolution. I'm also
> orthogonalizing WRT motion.
>
> The processor is a Mac 2 x 2.66 GHz Dual-Core Intel Xeon, with 8GB
> RAM (and oodles of free space). OS X Server 10.4.9
>
> It crashes as follows:
>
> /Users/Shared/fsl/bin/contrast_mgr -f design.fts stats design.con
> contrast_mgr(2884) malloc: *** vm_allocate(size=2654208000) failed
> (error code=3)
> contrast_mgr(2884) malloc: *** error: can't allocate region
> contrast_mgr(2884) malloc: *** set a breakpoint in szone_error to
> debug
> Uncaught exception!
> Rendering using zmin=2.3 zmax=8
>
> I tried it without the prewhitening step, I've also tried removing
> some regressors (errors) but can't really drop any more. Neither of
> these options worked. Because of the nature of the experiment, I
> can't analyse the data separately for each block then combine in a
> fixed effects analysis.
>
> I do have a large number of contrasts (40) - does this contribute
> to the memory problem (i.e. could be solved if I ran half the
> contrasts in one feat and the other half in another)? Or is it
> purely a result of the large number of timepoints and large number
> of EVs? Perhaps I should just drop the temporal derivatives? I come
> across this memory problem frequently with FEAT and would really
> like to know how other people come to a solution.
>
> Any advice would be greatly appreciated!
>
> Cheers,
> Clare


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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director,  Oxford University FMRIB Centre

FMRIB, JR Hospital, Headington, Oxford  OX3 9DU, UK
+44 (0) 1865 222726  (fax 222717)
[log in to unmask]    http://www.fmrib.ox.ac.uk/~steve
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