that's probably the problem then, since mri_fwhm will need about 6x the size of all.nii. Run selxavg3-sess with the -no-fwhm option (though it might not be in your version).

Krishna Srihasam wrote:

Hi, "all.nii" takes 1309 MB. I have 4 GB RAM and a 80 GB HDD. regards, Krishna

Douglas N Greve wrote:

...

how big is all.nii and how much memory do you have on that computer?

Krishna Srihasam wrote:

...

Hi, I am analyzing my fMRI data and I got a memory alloc problem in "mri_fwhm" The exact message is :

mri_fwhm --mask /tmp/sk/FSFAST/abe_090116/bold/VisualActivations/mask.nii --i /tmp/sk/FSFAST/abe_090116/bold/VisualActivations/res/all.nii --sum /tmp/sk/FSFAST/abe_090116/bold/VisualActivations/fwhm.sum --dat /tmp/sk/FSFAST/abe_090116/bold/VisualActivations/fwhm.dat MRIalloc(96, 84, 33): could not allocate 32256 bytes for 12483th slice

voxelvolume 3.1901 mm3 Loading mask /tmp/sk/FSFAST/abe_090116/bold/VisualActivations/mask.nii Search region is 84788 voxels = 270482.522603 mm3 Polynomial detrending, order = 0 Detrending Cannot allocate memory

I am using the binaries from "freesurfer-Linux-rh9-stable-pub-v4.0.5". I am pretty new to FSFAST. Any pointers will be helpful.

regards, Krishna

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