I'm having a problem with mris_flatten (version 5.3.0)

Could you please help me fix this problem?

My command line is:
mris_flatten -w 0 -distances 12 7 $SUBJECTS_DIR/$SUBJECT/surf/lh.oc.patch.3d $SUBJECTS_DIR/$SUBJECT/surf/lh.oc.patch.flat

It returns the error:
using write iterations = 0
sampling 7 neighbors out to a distance of 12 mm
reading patch /home/jbang/Projects/replay/mri//replay06/surf/lh.oc.patch.3d with 30434 vertices (20.5% of total)
MRISreadPatch: bad vertex # (148517) found in patch file
No such file or directory

When making the patch lh.oc.patch.3d, I followed the processes below:
tksurfer-sess -s $SUBJECT -df sessdirfile -hemi lh -analysis retino -contrast UpperLower

select 3 points along a boundary between upper and lower visual fields (near calcarine sulcus) and press "Cut line". Then, select 4 points to define the cutting plane: 1 on lower side of the line, 2 on upper side of the line, 3 on the opposite surface (use rotation tool), and 4 to specify which portion of surface is kept, and press "Cur plane". File->Patch->Save Patch As lh.oc.patch.3d

So I think I made the patch correctly.

! weird thing that I suspect is that when I click save patch as, the default location is $SUBJECTS_DIR/fsaverage/surf/ , so I had to change it to $SUBJECTS_DIR/$SUBJECT/surf

Could you please help me?

Thanks a lot!

Best,

Ji Won