Error while converting xfig figure

[Paul Smith]

Dear All

I have tried to include a figure.pstex_t into a LyX document with
'Insert -> File -> External Material', but I get the error when I
'View -> Postscript':

"An error occurred whilst running sh '/usr/share/lyx/scripts/fig2pstex.sh'

Any ideas? The figure and the LyX file are attached.

Paul

figura.pstex_t
Description: Binary data

figure.pstex
Description: Binary data

figure.lyx
Description: application/lyx