Hi Tamara, We would need more information to understand what happened. It would be great if you could use "Help... Report a Bug" in the Chimera menu, which will include stuff like Chimera version automatically, but it would be additionally helpful if you added your own description of the steps leading up to the problem and attached a session with the two structures used as input to morphing. Then, if that is enough information to figure out what happened, and you include your email address on the bug report, we could tell you about any workaround, if it exists. My only suggestion at this point is to try morphing without minimization, and/or if you had deleted any atoms from the structures, reopening the structures and trying morphing again without deleting any atoms. Best, Elaine ----- Elaine C. Meng, Ph.D. meng@cgl.ucsf.edu UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco http://www.cgl.ucsf.edu/home/meng/index.html On Oct 1, 2008, at 2:22 PM, Frembgen Kesner, Tamara A wrote:

Hello,

Does anyone know what the error message

cannot interpolate models: underlying C++ Atom object is missing

means? (And what I can do about it?) I am getting this message when I attempt to create a morph between two .pdb files using minimize.

Thank you.