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Dear Freesurfer Team, 

I have been struggling with an error using the mri_gmfit command. I have been trying to run a simple surface-based group analysis on 28 subjects testing whether a continuous variable "OMEGA3_457" relates to various RSI measures while adjusting for the effects of gender. 

This is the error I am getting:

and attached is my .fsgd file. The matrix file I am using is testing for the following contrast: 0 0 0.5 0.5. 

I produced the lh.N0s2_e4pos.10.mgh file using the mri_surf2surf command after using mri_concat to concatenate the RSI data for all 28 of our subjects into a single lh.N0s2_e4pos.00.mgh file. I have also attached the text file (containing all the paths to the subject data) that was fed into the mri_concat command.

Any help would be immensely appreciated. 

Thank you, 

Amaryllis A. Tsiknia 

Imaging Researcher

Department of Neurosciences 

University of California, San Diego

atsiknia@health.ucsd.edu

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