Error using sub2ind Out of range subscript.

I have this eeg data and I want to use fieldtrip to align the data. This is the code that Im using but whenever I try to interact with the graph it gives me it gives me this error; Error using sub2ind (line 71) Out of range subscript.

subjID = 'SubjectUCI29';
mri = ft_read_mri([subjID '_MR_acpc.nii']); % we used the dcm series
mri = ft_determine_coordsys(mri);
cfg           = [];
cfg.method    = 'interactive';
cfg.coordsys  = 'acpc';
mri_acpc = ft_volumerealign(cfg, mri);

Its from the paper;

Analysis of human ECoG and sEEG recordings

Please help me

[Walter Roberson]

Which line is generatoring the error? Please show the complete error messages.

[Basak Su]

cfg           = [];
cfg.method    = 'interactive';
cfg.coordsys  = 'acpc';
mri_acpc = ft_volumerealign(cfg, mri);

This part of the code generates a a simulation where you can interact with but when I try to interact with it, it gives me this error;

Error using sub2ind (line 71)

Out of range subscript.

Error in ft_volumerealign>cb_redraw_ortho (line 1550)

ind = sub2ind(mri.dim(1:3), round(vox(1)), round(vox(2)), round(vox(3)));

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in ft_volumerealign>cb_redraw (line 1396)

cb_redraw_ortho(h, eventdata)

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in ft_volumerealign>cb_buttonpress (line 1987)

cb_redraw(h);

^^^^^^^^^^^^

Error while evaluating Figure WindowButtonDownFcn.