Mex File error during call to eeg_leadfield

[Jared Van Snellenberg]

Hi all,

I'm working on a DICS beamformer analysis, and ran into a Mex file error.

Here's the MATLAB error (as you can see I have the most recent versions of 
MATLAB and FIELTRIP):

??? Invalid MEX-file 'C:\Program Files\MATLAB\R2007a\fieldtrip-20070717
\private\plgndr.dll': The specified procedure could not be found.

.

Error in ==> fieldtrip-20070717\private\eeg_leadfield4 at 126
    P0  = plgndr(n,0,cos_theta);		% zero'th order Legendre

Error in ==> fieldtrip-20070717\private\compute_leadfield at 447
        lf = eeg_leadfield4(pos, sens.pnt, vol);

Error in ==> fieldtrip-20070717\private\beamformer_dics at 212
        lf = compute_leadfield(dip.pos(i,:), grad, vol, 'reducerank', 
reducerank, 'normalize', normalize);

Error in ==> sourceanalysis at 855
      dip(i) = beamformer_dics(grid, sens, vol, [],  squeeze(Cf(i,:,:)), 
optarg{:});


In case it helps, my cfg options are as follows:

src_cfg.method='dics';
src_cfg.vol.r=[71 72 79 85];
src_cfg.vol.c=[0.3300 1 0.0042 0.3300];
src_cfg.vol.o=[0 0 35.9];
src_cfg.grid.xgrid=-85:5:85;
src_cfg.grid.ygrid=-85:5:85;
src_cfg.grid.zgrid=-50:5:125;
src_cfg.grid.resolution=5;
src_cfg.channel=1:59;

Also, the data contain an elec field with a 61x3 list of coordinates (in 
mm, like the cfg.grid) and a 61x1 cell array of channel labels.

The data come from a call to freqanalysis with the following options:

f_cfg.method='mtmconvol';
f_cfg.output='powandcsd';
f_cfg.taper='hanning';
f_cfg.tapsmofrq=1;
f_cfg.keeptrials='yes';
f_cfg.channel=1:59;


Any assistance would be greatly appreciated.

Regards,

Jared Van Snellenberg
Social Cognitive Affective Neuroscience Unit
http://scan.psych.columbia.edu 
(212) 854-7858 p
(212) 854-3609 f
Department of Psychology, Columbia University
406 Schermerhorn Hall
1190 Amsterdam Avenue, Mail Code 5501
New York, NY 10027

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