Hi Bharat,

your residue numbers don't match. Read about the "matchmaker" argument here:
http://pymolwiki.org/index.php/Fit

Cheers,
  Thomas

On 27 Apr 2015, at 05:46, bharat gupta <bharat.85.m...@gmail.com> wrote:

> Hi,
> 
> I am using rms_cur for calculating rmsd for two sets of structures. It works 
> for the first set but for the second one its gives error:
> PyMOL>rms_cur sel1,sel2
> ExecutiveRMS-Error: No atoms selected.
> 
> Here's the result for set1:
> 
> PyMOL>select sel1, native and resid 1:53+56:72 and name P and chain M
>  Selector: selection "sel1" defined with 0 atoms.
> PyMOL>select sel1, native and resid 142:237 and name P and chain M
>  Selector: selection "sel1" defined with 95 atoms.
> PyMOL>select sel2, best and resid 142:237 and name P and chain B
>  Selector: selection "sel2" defined with 95 atoms.
> PyMOL>alter all,segi=""
>  Alter: modified 10424 atoms.
> PyMOL>alter all,chain=""
>  Alter: modified 10424 atoms.
> PyMOL>rms_cur sel1,sel2
>  Executive: RMS =    7.985 (95 to 95 atoms)
> 
> 
> ============
> 
> Here's the result for set2:
> PyMOL>select sel1, 1sj3-1_16715 and chain R and name P and resid 764:835
>  Selector: selection "sel1" defined with 72 atoms.
> PyMOL>select sel2, 1sj3 and chain R and name P and resid 101:172
>  Selector: selection "sel2" defined with 72 atoms.
> PyMOL>alter all,segi=""
>  Alter: modified 6110 atoms.
> PyMOL>alter all,chain=""
>  Alter: modified 6110 atoms.
> PyMOL>rms_cur sel1,sel2
> ExecutiveRMS-Error: No atoms selected.
> PyMOL>rms_cur sel1,sel2
> ExecutiveRMS-Error: No atoms selected.
> 
> What is the reason behind this ??
> 
> -- 
> Best Regards
> Bharat

-- 
Thomas Holder
PyMOL Principal Developer
Schrödinger, Inc.


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