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TO: freesurfer@nmr.mgh.harvard.edu

SUBJECT: Error in Monte Carlo simulation: Error running mri_surfcluster

Hello FreeSurfer Developers,

I'm attempting to run a longitudinal analysis on structural T1 images for a sample, as described on the freesurfer wiki tutorial ( https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/LongitudinalTutorial). For post processing data, i used qdec option. However, when i want to use the monte carlo correction I receive the following Error:

Error in Monte Carlo:Error in running mri_surfcluster

If I change the number in /qdec/untitlted/fwhm.dat to the fwhm i have chosen in my analysis, the error is solved. But I wonder whether this is correct way to solve this error or not.

I've searched the list and no similar errors have been reported. Does anyone have any thoughts on how to trouble-shoot this one? Also, Ive attached the error in the terminal in case it's of any use.

1) FreeSurfer version: freesurfer-Darwin-OSX-stable-pub-v6.0-2beb96c 2) Platform: OS X ElCapitan verson 10.11.6

Thanks for your help Yours Behzad