Thank you for your Help. I figured out that it was a problem with the data 
which caused this error.





On Wed, 04 Jun 2014 12:00:08 -0400
Douglas N Greve <gr...@nmr.mgh.harvard.edu> wrote:

> 
> This is a strange error that I cannot figure out from the terminal 
> output. What version of FS are you using? Here's something you can try:
> 
> Run selxavg3-sess with --monly sxa3.m This will return right away having 
> created sxa3.m
> 
> Start matlab and run sxa3. It will stop at the error below. Then type
> 
> flac0.inorm
> 
> gmean
> 
> Each of these will print something out to the terminal. Send the results 
> to the list
> 
> doug
> 
> 
> On 06/02/2014 06:27 AM, pfannmo...@uni-greifswald.de wrote:
> > Dear Experts,
> >
> > during an fsfast analysis an error occured after selxavg3-sess was 
> > executed. The corresponding commands were:
> >
> > mkanalysis-sess -fsd bold -surface self lh -fwhm 0 -event-related -paradigm 
> > sensory.par -nconditions 1 -spmhrf 0 -TR 2 -refeventdur 10 -nskip 8 
> > -polyfit 2 -analysis analysis.lh -delay 0 -per-run -force -mcextreg
> > mkcontrast-sess -analysis analysis.lh -contrast stim-v-base -a 1
> >
> > selxavg3-sess -s ./sessdir -analysis analysis.lh -no-preproc -force
> >
> >
> >
> > The output of selxavg3-sess was:
> >
> >
> > sxa3pwd =
> >
> > /.../evaluation
> >
> > sxa3cmd =
> >
> > /usr/local/freesurfer/fsfast/bin/selxavg3-sess -s ./sessdir -analysis 
> > analysis.lh -no-preproc -force
> >
> >>> /usr/local/freesurfer/fsfast/toolbox/fast_selxavg3.m
> > #@# sessdir ###############################
> > /.../evaluation/sessdir
> > -------------------------
> > $Id: fast_selxavg3.m,v 1.100.2.2 2012/11/30 18:40:38 greve Exp $
> > /usr/local/freesurfer/fsfast/toolbox/fast_selxavg3.m
> > /usr/local/freesurfer/fsfast/toolbox/fast_ldanaflac.m
> > /usr/local/freesurfer/matlab/MRIread.m
> > -------------------------
> > outtop = /.../evaluation
> > Extension format = nii.gz
> >   1 stim-v-base.mat
> > Excluding 8 points
> > nruns = 1
> > autostimdur =
> >
> >
> > outanadir = /.../evaluation/sessdir/bold/analysis.lh
> > Excluding 8 points
> > Found 145573/155188 (93.8) voxels in mask
> > Creating Design Matrix
> >   ... creation time =  0.008 sec
> > DoMCFit = 1
> > ntptot = 108, nX = 15, DOF = 93
> > Saving X matrix to /.../evaluation/sessdir/bold/analysis.lh/Xtmp.mat
> > XCond = 64.7067 (normalized)
> > Computing compensation for resdual AR1 bias
> >   1  -0.5  -0.468819    (t=0.005249)
> >   2  -0.25  -0.252194    (t=0.007053)
> >   3  0  -0.0449419    (t=0.008126)
> >   4  0.25  0.149516    (t=0.00935)
> >   5  0.5  0.319324    (t=0.010795)
> > AR1 Correction M: 0.0749452 1.26122
> > Computing contrast matrices
> > OLS Beta Pass
> >    run 1    t= 0.0
> >      Global Mean
> > Global In-Mask Mean =  (0.664951)
> > ??? Error using ==> mrdivide
> > Matrix dimensions must agree.
> >
> > Error in ==> fast_selxavg3 at 434
> >      RescaleFactor = flac0.inorm/gmean;
> >
> >>> ------------------------------------------
> > ERROR: fast_selxavg3() failed\n
> >
> >
> > Do you have an idea what went wrong?
> >
> > Sincerely yours pfannmoe
> > _______________________________________________
> > Freesurfer mailing list
> > Freesurfer@nmr.mgh.harvard.edu
> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
> >
> >
> 
> -- 
> 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
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> 
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-- 
Joerg Pfannmoeller <pfannmo...@uni-greifswald.de>
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