Hi Dr. Greve,

Thank you very much. That worked beautifully. For those who are having the same problem as I did, the command:

mri_coreg --s subject_name --mov static_template.nii.gz --reg registration_matrix.reg.lta

creates a text file named registration_matrix.reg.lta on your current directory. Before, I was overwriting static_template.nii.gz by registration_matrix.reg.lta which in turn makes the command:

tkregisterfv --mov static_template.nii.gz --reg registration_matrix.reg.lta --surfs

fail as static_template.nii is the same as registration_matrix.reg.lta. I highly doubt others will make the same stupid mistake as I did but I outlined it nonetheless.

Again, thank you Dr.Greve for all the help. I appreciate every bit of it.

-Anderson