Dear Armin, I’m guessing you are using an input attribute definition file: <http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/defineattrib/defineattrib.html#attrfile> As the messages show, it is simply that when the file gives :259 that specifies two residues, :259.A (259 in chain A) and :259.B (259 in chain B). That should be fine if you want both those residues to get the same value. However, the messages you showed makes me think your input file contains: match mode: 1-to-1 You could just remove that line (or change "1-to-1" to “any”) to assign the value to both residues. Or, you can change :259 in the file to :259.A or :259.B if you really did want only one residue to get the value from each row in your input file. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Dec 25, 2017, at 4:31 AM, ARMIN HODAEI <ahodaei15@ku.edu.tr> wrote:

Dear Chimera Users, I am trying to define new attributes in Chimera, and I have written a new set of scores for every residue (for b-values) but after adding I get this error message.

It seems that I have to change the numbering of the residues on the PDB, to get correct colors. Sincerely, -- Armin Hodaei Department of Physics, Faculty of Arts and Sciences Koc University, Istanbul <error.png>