Hello, i read in the FEFF 8.4 manual, that the 6 modules are executed in ascending order. But now i'm confused concerning the modules 3 till 5. In module 3 the full multiple scattering is calculated. But only after this module the path enumeration (module 4) and the scattering amplitudes (module 5) are computed. I thought the path enumeration and the scattering amplitudes are required for calculation of the full multiple scattering? Why are these quantities calculated after the fms module? In my opinion this doesn't make sense. Another question affects the paper (page 9 and 10) of Zabinsky et al (attached). In the section "path enumeration" (respectively one side bevor) he introduced the quantity r_tot = total path length and R = r_tot/2 = effective path length. My question is, what is the meaning of the effective path length? In my opinion r_tot is the way and the way back? And R < r_tot is the path length without negligible contributions (scattering amplitude,...), is this right? The next question concerns the XANES-Card. What is the meaning of k respectively xkmax? In my opinion k is the wavenumber (of the photo electron wave?) which occurs in the xmu.dat in the third column, isn't it? Many thanks for your help! best regards, Eckhard