Hi James, To combine multiple commands on one line, use semicolon (not comma). Could that be the issue? Your specification looks fine if you wanted the surface to enclose chain A of model 7. Best, Elaine On Aug 26, 2008, at 1:25 PM, James Fethiere wrote:

Hi, I'm trying to create a category for separate surfacing of chains in a session that has multiple models. The following command: surfcat sh3 #7:.a, surf sh3 returns mangled atoms specifier. This may looks trivial but I can't find the right syntax to specify both the chain and residues in the same command. Any idea? Thanks James