Can't open . when trying to use Owl.Plot

[Bronsa]

No matter what driver I use (apart from null), I get the same error, I've tried using both a native version of owl and the dockerized version, same results.

Attached an example run using the dockerized version:

[~]> docker run -t -i ryanrhymes/owl
opam@01b1c902c61b:~/owl$ utop
----------------------------------+-------------------------------------------------------------+----------------------------------
                                  | Welcome to utop version 2.0.2 (using OCaml version 4.06.0)! |
                                  +-------------------------------------------------------------+

Type #utop_help for help about using utop.

-( 11:07:35 )-< command 0 >-----------------------------------------------------------------------------------------{ counter: 0 }-
utop # #require "owl_top";;
-( 11:07:35 )-< command 1 >-----------------------------------------------------------------------------------------{ counter: 0 }-
utop # Plot.plot_fun Maths.sin 1. 15.;;

Plotting Options:
 < 1> ps         PostScript File (monochrome)
 < 2> psc        PostScript File (color)
 < 3> xfig       Fig file
 < 4> null       Null device
 < 5> mem        User-supplied memory device
 < 6> wxwidgets  wxWidgets Driver
 < 7> svg        Scalable Vector Graphics (SVG 1.1)
 < 8> bmpqt      Qt Windows bitmap driver
 < 9> jpgqt      Qt jpg driver
 <10> pngqt      Qt png driver
 <11> ppmqt      Qt ppm driver
 <12> tiffqt     Qt tiff driver
 <13> svgqt      Qt SVG driver
 <14> qtwidget   Qt Widget
 <15> epsqt      Qt EPS driver
 <16> pdfqt      Qt PDF driver
 <17> extqt      External Qt driver
 <18> memqt      Memory Qt driver

Enter device number or keyword: 1
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .
Can't open .

*** PLPLOT ERROR, IMMEDIATE EXIT ***
Too many tries.
Program aborted
opam@01b1c902c61b:~/owl$ 

[jzstark]

Thanks for reporting this issue. I've recreated the same problem on my computer, but running the code below:

(* create the handle explicitly *)
let h = Plot.create "sin_plot.png" in 
Plot.plot_fun ~h Maths.sin 1. 15.; 
Plot.output h 

seems to work fine. This looks like a bug to be fixed in the Plot module.