Unable to create the png

[vishalnp37]

Hello, I just started using NEPER and linux(wsl),
I am unable to create a sample png image

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.5.1-4
Info   : Built with: gsl|muparser|opengjk|nlopt|libscotch
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2022, and GNU GPL'd, by Romain Quey.
Info   : No initialization file found (`/home/vishalnp37/.neperrc').
Info   : ---------------------------------------------------------------
Info   : MODULE  -T loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] -n 100
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Creating domain...
Info   : Creating tessellation...
Info   :   - Setting seeds...
Info   :   - Generating crystal orientations...
Info   :   - Running tessellation...
Info   : Writing results...
Info   :     [o] Writing file `n100-id1.tess'...
Info   :     [o] Wrote file `n100-id1.tess'.
Info   : Elapsed time: 0.026 secs.
========================================================================

vishalnp37@V-s-dell:~/neper/src$ neper -V n100-id1.tess -print img1

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.5.1-4
Info   : Built with: gsl|muparser|opengjk|nlopt|libscotch
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2022, and GNU GPL'd, by Romain Quey.
Info   : No initialization file found (`/home/vishalnp37/.neperrc').
Info   : ---------------------------------------------------------------
Info   : MODULE  -V loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] n100-id1.tess -print img1
Info   : ---------------------------------------------------------------
Info   : Loading tessellation...
Info   :     [i] Parsing file `n100-id1.tess'...
Info   :     [i] Parsed file `n100-id1.tess'.
Info   : Printing image...
Info   :   - Printing tessellation...
Info   :   - Generating png file (1200x900 pixels)...
Info   :     [o] Writing file `img1.png'...
Error  :     > File `img1.png' could not be generated!
Aborted

[rquey]

You have to install povray, which is called to generate png images.

[vishalnp37]

I see. Thank you. I need to read the manual throughly again.