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Dear Frederic, you probably need to mask your data during model specification, see p17 of John's document: http://www.fil.ion.ucl.ac.uk/~john/misc/VBMclass15.pdf Best regards, Guillaume. On 21/05/15 16:00, briend wrote: > Dear SPM users, > > I have recently acquired SPM 12 to run a VBM analysis. My preprocessing > (Segment, Run DARTEL –create Templates-, Normalise to MNI space) works > perfectly and my model for a between group comparison runs without any > problem as well. However after estimate my SPM.mat file (Stats & > factorial design specification> 2 samples t-test), I have a bug in the > Results: I have my contrast (-1 1), I don’t apply a mask, and don’t > proceed to FEW, then the problem begin, my terminal seems to play in > loop: > > Warning: Returning NaN for out of range arguments > In spm_Tcdf at 91 > In spm_ECdensity at 38 > In spm_P_RF at 63 > In spm_uc_RF at 38 > In spm_uc at 31 > In spm_getSPM at 783 > In spm_results_ui at 261 > > Could anyone suggest what could be the source of the problem and how to > solve it? > > Many thanks in advance, > > Frederic > -- Guillaume Flandin, PhD Wellcome Trust Centre for Neuroimaging University College London 12 Queen Square London WC1N 3BG