[pstricks] Problem with pst-map2d

[Venustiano Soancatl Aguilar]

I try to compile the next code

\documentclass{article}
\usepackage{pst-all}
\usepackage{pst-map2d}

\begin{document}
    \psset{linewidth=0.75\pslinewidth}
    {\psset{xunit=0.5,yunit=0.5}
    \begin{pspicture}*(-9,-9)(10,9)
        \psframe*[linecolor=ocean](-9,-9)(10,9)
        \psframe(-9,-9)(10,9)
        \WorldMap[maillage=false]
    \end{pspicture}}
\end{document}

but I get the next error 

*****
*****     PStoPDF output: 
*****     cd '/media/disk/cursos/latex/pstricks/pst-map23d/examples'
*****     ps2pdf 'world.ps' 'world.pdf'
*****
Error: /undefinedfilename in --run--
Operand stack:
   (river1.dat)   (r)
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1905   1   3   %oparray_pop   1904   1   3   %oparray_pop   1888   1   3   %oparray_pop   1771   1   3   %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   1905   1   6   %oparray_pop   --nostringval--
Dictionary stack:
   --dict:1151/1684(ro)(G)--   --dict:0/20(G)--   --dict:104/200(L)--   --dict:175/300(L)--   --dict:38/200(L)--   --dict:115/200(L)--
Current allocation mode is local
Last OS error: 2
Current file position is 106082
GPL Ghostscript 8.61: Unrecoverable error, exit code 1

Is there anything I can do. Thanks in advance..

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