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Dear phenix community I am attempting to use phenix.fit_loops for the first time and getting an error message: "No suitable gap found matching residues" I found a short exchange exactly about this (Jan 2011), but eventually Tom Terwilliger asked for the files directly to see if he could solve it. I can't seem to find a later summary of the solution. (apparently, the most probable reason was some kind of mismatch between PDB numbering and sequence file...which I shouldn't have... I'm probably missing some silly here - I have been fiddling around with the sequence file in many ways...with no success) many thanks for any help! alejandro -- Alejandro Buschiazzo, PhD Research Scientist Unit of Protein Crystallography Institut Pasteur de Montevideo Mataojo 2020 Montevideo 11400 URUGUAY Phone: +598 25220910 int. 120 Fax: +598 25224185 http://www.pasteur.edu.uy/pxf