[lammps-users] Problems with using gnu.py in pizza.py on windows system

Hi folks,

I am new to Lammps and pizza.py.

When I try to run test_gnu.py, I encounter the following error messages

>@run test_gnu.py

Executing file: ./test_gnu.py

Error in sys.excepthook:

Traceback (most recent call last):

File “C:\Python24\Lib\site-packages\pizza\tools\pizza.py”, line 221, in trap

execfile(fullfile, namespace)

File “./test_gnu.py”, line 18, in ?


File “C:\Python24\Lib\site-packages\pizza\tools\gnu.py”, line 145, in plot


File “C:\Python24\Lib\site-packages\pizza\tools\gnu.py”, line 325, in draw self.call(cmd)

File “C:\Python24\Lib\site-packages\pizza\tools\gnu.py”, line 119, in__call__

Self.GNUPLOT.write(command +’\n’)

IOError: [Errno 22] Invalid argument

Original exception was:

File “”, line 1

@run test_gnu.py

Below is some information about the setting of my computer :

  1. pizza.py-1Oct2006 is running with Python2.4 on windows vista;

  2. gnuplot version 4.4 either for windows or ms-dos (I tried both but neither of them is working; I downloaded the binary version and just simply unzipped to a directory without installation; then “gnuplot.ext” path is added to the DEFAULTS.py file);

  3. I make the following changes to “DEFAULTS.py” of the pizza.py

PIZZA_GNUPLOT = “C:\Users\taomj\gnuplot\bin\gnuplot”


Many thanks for your advice and help in advance!