Dear SPM experts, I have applied ICA to my MEG data to remove blink artefacts. The ICA transformation is executed at the last step of the preprocessing. We used spm_eeg_montage. The processus is working but when i looked at the topo plot of one trial (trial i knew was contamined by a blink) via the display of the GUI, i get an error (see below) and the image is not normal (see attached). Warning: Duplicate x-y data points detected: using average of the z values. > In griddata at 105 > In spm_eeg_plotScalpData>doChangeTime at 248 Does anyone know where the problem come from? Thank you very much for your answer, -- Sophie Galer - Ph.D. student National Fund for Scientific Research (F.R.S - FNRS) Université Libre de Bruxelles LCFC-UR2NF +322/555.42.98 +322/650.42.62 Hôpital Erasme 808 route de Lennik B-1070 Brussels, Belgium