Hi, when using trjconv (v 3.2.1) with the option -pbc cluster the programs writes something like: COM: 8.154 6.749 4.423 iter = 617715 COM: 2.542 6.404 4.423 iter = 617716 COM: 8.154 6.749 4.423 iter = 617717 COM: 2.542 6.404 4.423 iter = 617718 ..... and no output is given! Any idea? Grazie isabella