Comment 22 for bug 1658260

thanks. sorry, I guess I should have asked for this up-front. Could you also attach the plt file you got as well as the svg file you got when you read the plt file back in? Inkscape does not actually get involved in the actual conversion process here, it simply calls uniconverter. So it is not likely that this will be fixable in Inkscape. But it might be worthwhile to see whether the error occurred on output or on input.

Failing that, there is a uniconverter website where you can report bugs, at:
https://sk1project.net/forum/viewforum.php?forum_id=6&rowstart=0