Dear Rajarshi Roy,
The command in ChimeraX to match small molecules is “align” (not “match,” which is the same as “matchmaker” and works for biopolymers).

<http://rbvi.ucsf.edu/chimerax/docs/user/commands/align.html>

The error message is wrong!  Sorry about that, we will fix it.  I guess the error message was copied from Chimera to ChimeraX without updating the wording.

Apologies for the inconvenience.   
Best,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Dec 17, 2019, at 10:28 PM, Rajarshi Roy <phd1701171011@iiti.ac.in> wrote:
>
> Dear ChimeraX,
> I am trying to superimpose multiple carbohydrate chains using chimeraX. Using match command, I am unable to do the same.
> Here is my command:
> match #2:1-4 to  #1:1-4
> But I am getting the following error:
> Reference and/or match model contains no nucleic or amino acid chains.
> Use the command-line 'match' command to superimpose small molecules/ligands.
>
> Already I am using match command, still why the same error is showing?
> Please advise me on how to proceed?
> Thank you in advance.
>
> --
> with regards
> Rajarshi Roy