psfgen question

From: MinSoo Kim (
Date: Fri Jan 30 2004 - 04:00:35 CST


i'm having trouble with creating a segment for my counter ions...
this is what i have
% alias residue NA SOD
aliasing residue NA to SOD
% segment SOD {
auto none
pdb /Users/visitor2/NAMD/Sodium.pdb
building segment SOD
disabling angle autogeneration
disabling dihedral autogeneration
reading residues from pdb file /Users/visitor2/NAMD/Sodium.pdb
extracted 0 residues from pdb file
Info: generating structure...
Info: segment complete.

it fails to extract any residue..
does anyone know why?

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