It's probably the case that the surface did not intersect your volume, which probably means that the registration is wrong. Did you visually inspect the registration with tkregister2?
doug
Joongnam Yang wrote:
Hi,
I would appreciate any comment on the following warning when I ran mri_vol2surf. At the end there is a warning, which might be serious. I ran lh and rh separately, and no warning message was issued for lh and the following warning was only issued for rh. . . . Done Mapping Source Volume onto Source Subject Surface vol2surf_linear: nhits = 144115/149534 Done mapping volume to surface Number of source voxels hit = 4441 Warning: all vertex values are zero
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