Hello Nyasha,
I’m guessing it is because the local executable location has a space in it.  You may need to put it in a path that does not contain a space. (I don’t know if putting quotation marks around the current location would work, although you could try it.)
I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Jan 24, 2018, at 5:19 AM, Niasha Tauro <niash.t24@gmail.com> wrote:
>
> Hello Chimera Users
> Can you please help me rectify the following error showing on chimera (1.11.2 version) during molecular docking:
>
> 'C:\molecular' is not recognized as an internal or external command,
> operable program or batch file.
> -----
> Application stdout
> -----
> [no output]
> -----
>  I have installed Autodock Vina and i am using the local executable location: vina.exe
> your assistance will be greatly appreciated
>
> kind regards
> Nyasha Tauro