Is the status is stuck on "Starting PCA..."? If so, then you may have too many subjects or too much data. On Saturday, February 04, 2012 09:52:46 you wrote: > Dear all, > > I am trying to run a single-session ICA on SPM preprocessed functional data > using MELODIC 3.0. I am entering the smoothed 4D data (500 volumes) and > defining all the needed parameters on "data" and deselecting all the other > preprocessing steps on "Pre-Stats" and "Registration" but no components > have been estimated so far after over 24 hours running time. > > I would appreciate any help. > > Best, > Sandra