Hi I want to do statistics with both flip and non-flipped images. I have flip the images in both fsl and spm. But I get the following error message when I try to run the analysis (both when I try to use flipped images from fsl or from spm): "Error running job: Error using ==> spm_check_orientations The orientation etc must be identical for this procedure" Can I correct this error without using reslice on the flipped images? And if I have to use reslice, can someone explain what actually happens to the images that I use reslice on? Best regards Emilia