Hi John:
My
guess is you are encountering some sort of memory management issue
(heap
corruption) or memory leak in the wingcc code or in the PLplot
core
library that is triggered by all your iterations.
My bet is on a
memory management issue for the combination of
wingcc and the general
PLplot -np option that you are using. My
impression is that
combination does not work as well as it should. For
example, although
results for the wingcc device normally display well
for me on the
Wine platform, they only show "transparent" results
(just the frame
for the window with everything else leaking through
from the display
below) if the -np PLplot option is used. Of course,
this strange
behaviour might just be the result of a Wine bug, but the
other
alternative is some memory management issue with how -np is
implemented
for the wingcc device driver that is creating a wide
variety of
peculiar results on various platforms.
To distinguish whether the
problem is in wingcc + the -np option or in
the PLplot core, what
happens if you try the equivalent for the svg
device? (The -np
option is ignored in that case since svg is a
file-oriented device.
However, use the command line options
-fam -fflen 3
so
that each of your plot pages [generated by plenv] will be written
to a
separate file rather than just the first page written to one file
with
the rest of the pages dropped). I also suggest you keep the
number
of iterations small until you get an idea of the disk space
consumed
by all the different svg page files you are going to generate
by a
large number of iterations.
If you do have any trouble with the
svg case could you simplify the
example as much as possible while
still demonstrating the issue, and
then send me that simplified code
so I can try it for myself? I would
be happy to run it here on Linux
under valgrind to check for any
memory management or memory leak
issues. Unfortunately, I cannot do
such a check for wingcc since
wingcc is Windows only and valgrind is
Unix only.
Alan
__________________________
Alan
W. Irwin
Astronomical research affiliation with Department of
Physics and Astronomy,
University of Victoria
(astrowww.phys.uvic.ca).
Programming affiliations with the
FreeEOS equation-of-state
implementation for stellar interiors
(freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net);
PLplot scientific plotting
software package (plplot.sf.net); the
libLASi project
(unifont.org/lasi); the Loads of Linux Links project
(loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
__________________________
Linux-powered
Science
__________________________
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