Hi there, while loading a set of EPI images for a 1st level analysis I got a 'funny' error using ==> spm_check_orientations at 32 for sure my images are correct, using a loop across my images with V.dim(1) == V.dim(i) I got my sum = all my images, ie all dimensions are equals, but still spm_check_orientations gives me an error ; note they are also all well oriented (spm_orientation ok). the only remaining thing is that reshape(cat(3,V.mat),[16,numel(V)]) is > 1e-4 but I have no idea why this limit ?? any help would be greatly appreciated cyril