Hi, Wenfu

The putty representation uses the values on the b-factor column of the pdf
file and your file has the same value for each atom (0.0), hence the error.
If you want to have residues with different width you need different
b-factor values for different residues. If, on the other hand you are OK
with all residues having the same width, just do

set cartoon_putty_transform, 2

Cheers,
Osvaldo.



On Mon, Apr 13, 2015 at 10:34 AM, <m...@mskcc.org> wrote:

>  Hi pymol users,
>
>  I have a pdb file, which is from the result of a molecular dynamics
> simulation. I want to present the structure with cartoon putty in pymol.
> But I can only make it cartoon putty in Macpymol 0.99 version. When I use
> pymol1.7 or 1.3 version, the error is like this: Extrude-Warning: invalid
> putty settings (division by zero)
> I attach part of the pdb file and hope to get your suggestions.
>
>  Thanks,
> Wenfu
>
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