Hi Arno,
Please give these matlab commands a shot.

[v,M, mr] = load_mgh('orig.mgz');
save_mgh(v, 'orig.mgz', M, mr);

-Louis


On Fri, 20 Jan 2012, Arno Klein wrote:

> dear doug,
>
> sadly, no dice.
>
> cheers,
> @rno
>
>
>
> On Fri, Jan 20, 2012 at 4:45 PM, Douglas N Greve
> <gr...@nmr.mgh.harvard.edu>wrote:
>
>> Try doing it in matlab, so
>> a = MRIread('orig.mgz');
>> MRIwrite(a,'orig.mgz');
>>
>> doug
>>
>> Arno Klein wrote:
>>
>>>
>>> dear doug,
>>>
>>> i am using FS v5.1 now but ran the 20 oasis subjects through FS v5.0.  i
>>> am only having this trouble for one of the subjects.
>>>
>>> after the mri_convert workaround i am still getting the same memory
>>> allocation error.
>>> cheers,
>>> @rno
>>>
>>>
>>>
>>> On Fri, Jan 20, 2012 at 4:23 PM, Douglas N Greve <
>>> gr...@nmr.mgh.harvard.edu 
>>> <mailto:gr...@nmr.mgh.harvard.**edu<gr...@nmr.mgh.harvard.edu>>>
>>> wrote:
>>>
>>>    This is a strange problem we've been having with some mgz files
>>>    that were generated during a short period of time last summer when
>>>    there was a bug in the mgz writing code. What version of FS are
>>>    you using? In the current dev version, this should not be a
>>>    problem. A work-around is to convert the orig.mgz to itself using
>>>    mri_convert in the dev environment, ie,
>>>
>>>    mri_convert orig.mgz orig.mgz
>>>
>>>    doug
>>>
>>>    Arno Klein wrote:
>>>
>>>
>>>        i get the following memory allocation error for only one out
>>>        of 20 oasis subjects that i processed with freesurfer 5.1 on
>>>        an ubuntu 11.10 machine with 24gb memory:
>>>
>>>        mris_register -curv subjects/OAS1_0061_MR1/surf/**lh.sphere
>>>        templates_freesurfer/lh.KKI_2.**tif
>>>        subjects/OAS1_0061_MR1/surf/**lh.sphere_to_KKItemplate.reg
>>>        using smoothwm curvature for final alignment
>>>        $Id: mris_register.c,v 1.59 2011/03/02 00:04:33 nicks Exp $
>>>         $Id: mrisurf.c,v 1.693.2.2 2011/04/27 19:21:05 nicks Exp $
>>>        reading surface from subjects/OAS1_0061_MR1/surf/**lh.sphere...
>>>        TAGskip: tag=1717658469, failed to calloc 1868656640 bytes!
>>>        Cannot allocate memory
>>>
>>>        system information:
>>>
>>>        FREESURFER_HOME: /usr/local/freesurfer
>>>        Build stamp: freesurfer-Linux-centos4_x86_**64-stable-pub-v5.1.0
>>>        Debian version: wheezy/sid
>>>        Kernel info: Linux 3.0.0-14-generic x86_64
>>>
>>>        cheers,
>>>        @rno
>>>
>>>        ------------------------------**------------------------------**
>>> ------------
>>>
>>>        ______________________________**_________________
>>>        Freesurfer mailing list
>>>        Freesurfer@nmr.mgh.harvard.edu
>>>        
>>> <mailto:freesur...@nmr.mgh.**harvard.edu<Freesurfer@nmr.mgh.harvard.edu>
>>>>
>>>
>>>        
>>> https://mail.nmr.mgh.harvard.**edu/mailman/listinfo/**freesurfer<https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer>
>>>
>>>
>>>    --     Douglas N. Greve, Ph.D.
>>>    MGH-NMR Center
>>>    gr...@nmr.mgh.harvard.edu 
>>> <mailto:gr...@nmr.mgh.harvard.**edu<gr...@nmr.mgh.harvard.edu>
>>>>
>>>    Phone Number: 617-724-2358 <tel:617-724-2358> Fax: 617-726-7422
>>>    <tel:617-726-7422>
>>>
>>>    Bugs: 
>>> surfer.nmr.mgh.harvard.edu/**fswiki/BugReporting<http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
>>>    
>>> <http://surfer.nmr.mgh.**harvard.edu/fswiki/**BugReporting<http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
>>>>
>>>    FileDrop: 
>>> www.nmr.mgh.harvard.edu/**facility/filedrop/index.html<http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
>>>    
>>> <http://www.nmr.mgh.harvard.**edu/facility/filedrop/index.**html<http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
>>>>
>>>
>>>
>>>
>>>
>>>    The information in this e-mail is intended only for the person to
>>>    whom it is
>>>    addressed. If you believe this e-mail was sent to you in error and
>>>    the e-mail
>>>    contains patient information, please contact the Partners
>>>    Compliance HelpLine at
>>>    
>>> http://www.partners.org/**complianceline<http://www.partners.org/complianceline>.
>>>  If the e-mail was sent to
>>>    you in error
>>>    but does not contain patient information, please contact the
>>>    sender and properly
>>>    dispose of the e-mail.
>>>
>>>
>>>
>> --
>> Douglas N. Greve, Ph.D.
>> MGH-NMR Center
>> gr...@nmr.mgh.harvard.edu
>> Phone Number: 617-724-2358 Fax: 617-726-7422
>>
>> Bugs: 
>> surfer.nmr.mgh.harvard.edu/**fswiki/BugReporting<http://surfer.nmr.mgh.harvard.edu/fswiki/BugReporting>
>> FileDrop: 
>> www.nmr.mgh.harvard.edu/**facility/filedrop/index.html<http://www.nmr.mgh.harvard.edu/facility/filedrop/index.html>
>>
>>
>
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