latex2html (using pnmtopng from netpbm) fails to create png images for math symbols on 10.5.2

[simon.c.blyth@…]

 latex2html to.tex

This is LaTeX2HTML Version 2002-2-1 (1.71)
by Nikos Drakos, Computer Based Learning Unit, University of Leeds.
...
 *** processing 1 images ***

Generating postscript images using dvips ...
This is dvips(k) 5.95a Copyright 2005 Radical Eye Software (www.radicaleye.com)
' TeX output 2008.03.18:1444' -> /tmp/l2h4967/image
(-> /tmp/l2h4967/image001) <tex.pro><alt-rule.pro><texps.pro><special.pro>
<color.pro><cmsy10.pfb>[1] 
Converting image #1
pstoimg: Error: "/opt/local/bin/ppmquant -floyd 256 < /tmp/l2h4967/p4980.pnm | /opt/local/bin/pnmtopng -interlace -trans 'gray85'  > img1.png" failed: Invalid argument

Error while converting image

Doing section links ......
 *** Adding document-specific styles *** 
Done.

Switching on debug for pstoimg reveals the error message to be misleading :

simon:tex blyth$ export DEBUG=1   
simon:tex blyth$ latex2html to.tex
...

 *** processing 1 images ***

...
Running "/opt/local/bin/ppmquant 256 < /tmp/l2h5269/p5282.pnm | /opt/local/bin/pnmtopng -interlace -trans 'gray85'  > img1.png"
pnmcolormap: making histogram...
pnmcolormap: 10 colors found
pnmcolormap: Image already has few enough colors (<=256).  Keeping same colors.
pnmremap: 10 colors found in colormap
pnmtopng: can't open color names dictionary file named /usr/lib/X11/rgb.txt, /usr/openwin/lib/rgb.txt, or /usr/X11R6/lib/X11/rgb.txt and Environment variable RGBDEF not set.  Set RGBDEF to the pathname of your rgb.txt file or don't use color names.
pstoimg: Error: "/opt/local/bin/ppmquant 256 < /tmp/l2h5269/p5282.pnm | /opt/local/bin/pnmtopng -interlace -trans 'gray85'  > img1.png" failed: 

Error while converting image

Doing section links ......
Done.

Searching for rgb.txt

mdfind "kMDItemDisplayName == 'rgb.txt'" | xargs ls -l
-rw-r--r--  2 root   admin  17315 Mar 18 03:15 /opt/local/share/lib/latex2html/styles/rgb.txt
-rw-r--r--  2 root   wheel  19974 Mar 18 00:25 /opt/local/share/netpbm/rgb.txt
-rw-r--r--  1 root   wheel  17371 Sep 24 13:34 /usr/X11/share/X11/rgb.txt

Trying again, following the hint from the debug ... succeeds to create the pngs :

export RGBDEF=/opt/local/share/netpbm/rgb.txt
latex2html to.tex
...

The installation would be improved if it was not necessary to set this in the environment.

[blb@…]

This is actually an issue with the netpbm port (which provides pnmtopng); should be fixed in r48690.

[anonymous]

Milestone Port Bugs deleted