Hi - it's not obvious what might be the problem here, assuming that the data is valid (matching sizes, and not massively huge numbers of voxels). There will be a new FSL patch release in the next week or two, including some changes in melodic - so it might be worth trying with the new version when it comes out.

Please see the FSL FAQ on RAM/swap/etc issues - assuming that you're running a 64bit version of FSL on a 64bit OS on 64bit hardware (the latter point at least seems clear from your email) then there should not be a problem. In which case it might be worth uploading the data (along with the command line call you're using) for us to do a quick check on - see the FSL wiki for upload instructions.

On 23 Apr 2013, at 12:09, Mahsa Shokouhi <[log in to unmask]> wrote:

Hi

I'm facing an error message when running melodic on a group of functional images (from a few subjects). Each 4D file (for each subject) contains 94 volumes which are normalized to the MNI template prior to running melodic. The following error seems to be happening when reading the second file on the list (corresponding to second subject):

Reading data file ./.../functional4D ... done
Removing mean image ...terminate called after throwing an instance of 'std::bad_alloc'
what(): std::bad_alloc
Abort (core dumped)
20.913u 2.460s 0:24.45 95.5% 0+0k 68544+240io 30pf+0w

Looking at the forum it appears to be a memory issue even though my pc has 31.6 GB memory (processor: Intel® Core™ i7-3930K CPU @ 3.20GHz × 8). Melodic seems to fail for even 2 subjects and I wonder what is the source of this issue.

Thanks
Mahsa

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