Dear Chimera developers and sophisticated users, I have trouble to show the surfaces of serveral crystal structures, including 1rzk and 2b4c. Whenever I select: Action/Surface/Show, I would get pop-up error window and the following message in my Reply Log: C:\Program Files\Chimera\bin\mscalc.exe 1.400000 2.000000 0 Surface calculation failed, mscalc returned code 5 C:\Program Files\Chimera\bin\mscalc.exe 1.400000 2.000000 0 Surface calculation failed, mscalc returned code 5 Since I don't have problem with other pdb files, such as 3dnn, I wonder if this problem is simply associated with some particular pdb files? If anyone out there knows a few tricks to overcome this, I'd really appreciate it. Many thanks in advance, Sean ---------------------------------------------- Sean Du, Ph.D. Senior Scientist, Project Leader Maxygen, Inc. 515 Galveston Drive Redwood City, CA 94063 Office: (650) 298-5380 Cell: (510) 366-3586 -----------------------------------------------