... which is why simplifying your predicate would have helped you
identify which part was wrong. Once you actually try

close = name "T3P";
close

and see that you get no atoms, your error becomes much easier to see!
Also faster than emailing ;-)

Mark

On Wed, Aug 21, 2013 at 4:46 PM, Albert <mailmd2...@gmail.com> wrote:
> Hello Mark:
>
>  thanks for kind advices.
>
>  I checked my residues number carefully, and I didn't find anything wrong.
> However, I am not sure whether the syntax of my selection.dat is all right
> or not, since the documentation for this option is not well clarified.
>
> thank you very much
>
> Albert
>
>
>
> On 08/21/2013 04:35 PM, Mark Abraham wrote:
>>
>> Simplify your condition gradually and find out which bit is wrong!
>>
>> Mark
>
>
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