Hello, I want to make everyone aware of some bugs that I think I have found in atoms, and pose some questions regarding the bugs, to anyone who may have seen them before. I have attached two atoms input files, generated using the Artemis atoms interface. The file A2n_atoms.inp is for a monoclinic structure in the A 2/n setting. On running atoms, one will find that there are six Ga atoms within a 4 A radius from the central Ga atom. If one reduces the the cluster size from 8 A in the .inp file to 6 A, one finds that now there are only two Ga atoms within 4 A of the central Ga atom. So it appears that atoms does not necessarily include all atoms within the cluster radius. The leads me to the question: how big should I make the cluster if I want to include all atoms within 6 A? An input file for the same structure converted to the C 2/c setting is also attached. When running atoms in the Artemis interface, the message "The axis lengths and angles specified are not appropriate for the given space group" is returned. Although, it appears that a Feff.inp file is still generated. It also appears to not have the same cluster size dependence as the A2/n structure. So can I trust this feff.inp file even though I received an error message? It seems to me that the answer would be yes, atoms did the calculations correctly and the error message being generated is just a bug, but I'm not certain about this. Thank you, George