Hi Larissa/Ben, I only have version R2007a of MATLAB, and use SPM8 with version 2.4 of the Pickatlas (including SPM8 updates) - this combination has worked for my labmates without issue,however I have downloaded my versions more recently. One thing I notice, that may be linked to the problem is that when I calculate results (without Pickatlas installed), I get the following output in the command window: SPM8: spm_results_ui (v3928) 07:39:04 - 21/08/2010 ======================================================================== SPM computation : ...done Conversely, when I run results with the Pickatalas is installed in the SPM8 toolbox, I get the following: SPM8: spm_results_ui (v3928) 07:40:07 - 21/08/2010 ======================================================================== SPM computation : ...initialising SPM computation : ...done SPM computation : ...done which precedes the error: ??? Error using ==> spm_P Too many output arguments. Error in ==> wfu_spm_list8 at 341 [P Pn Em En EN] = spm_P(1,k,u,df,STAT,R,n,S); Error in ==> spm_list at 12 x = wfu_spm_list8(varargin{1:end}); ??? Error using ==> spm_list('List',xSPM,hReg); Error using ==> spm_P Too many output arguments. ??? Error while evaluating uicontrol Callback It seems that for some reason, SPM calculates the results twice when pickatlas is installed - is this possible? Rebecca