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Hi Tobias,
<div>I came across the same thing, and fixed it locally with a dirty hack. Please do drop by so that we can make a clean fix.</div>
<div>Best,</div>
<div>JM</div>
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<div>On Nov 17, 2015, at 4:12 PM, Tobias Staudigl <<a href="mailto:tobias.stdgl@gmail.com">tobias.stdgl@gmail.com</a>> wrote:</div>
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<div>Dear all, <br>
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I have some trouble using the polhemus headshape to realign the structural mri of a participant. Following an earlier post on this issue (<a href="http://mailman.science.ru.nl/pipermail/fieldtrip/2013-April/006493.html">http://mailman.science.ru.nl/pipermail/fieldtrip/2013-April/006493.html</a>),
I use ft_volumerealign twice:<br>
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cfg = [];<br>
cfg.method = 'interactive';<br>
cfg.coordsys = 'ctf';<br>
mri_realigned = ft_volumerealign(cfg,mri);<br>
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works fine, then: <br>
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cfg = [];<br>
cfg.method = 'headshape'<br>
cfg.coordsys = 'ctf';<br>
cfg.headshape.headshape = hs;<br>
mri_realigned2 = ft_volumerealign(cfg,mri_realigned);<br>
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after the message 'doing interactive realignment with headshape' I get the following error:<br>
**************<br>
Reference to non-existent field 'label'.<br>
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Error in ft_datatype_sens (line 136)<br>
nchan = length(sens.label);<br>
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Error in ft_checkconfig (line 248)<br>
cfg.elec = ft_datatype_sens(cfg.elec);<br>
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Error in ft_interactiverealign (line 68)<br>
cfg.template = ft_checkconfig(cfg.template, 'renamed', {'vol', 'headmodel'});<br>
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Error in ft_volumerealign (line 586)<br>
tmpcfg = ft_interactiverealign(tmpcfg);<br>
<div>**************<br>
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<div>Reading the polhemus headshape was done with:<br>
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[hs]=ft_read_headshape('hs_S01.pos');<br>
which looks fine when plotting it with <br>
ft_plot_headshape(hs);<br>
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<div>I am using the fieldtrip version at the Donders. <br>
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<div>When using an older version, fieldtrip-20131231, no error occurs. <br>
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Any help very much appreciated!<br>
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Best, <br>
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Tobias<br>
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