The replies have been helpful, but I'm still trying to figure out where 
the problem lies, but I have noticed that matplotlib-0.90.1 apparently 
doesn't use ttconv. I have this version installed at home and am able to 
generate poscript without a problem. Are you able to tell which package 
is complaining about the undefined symbol(s)?

If I downgrade (at work) I will probably lose some capabilities, since 
the file size of 0.91.2 is more than twice that of 0.90.1 (!) But I 
would prefer to be able to generate .ps or .eps, even if I lose the 
capability of using LaTeX for plot labels, e.g.

Best wishes,

Arthur

-------------------------------
amg -at- iri -dot- columbia -dot- edu


Johann Cohen-Tanugi wrote:
> Sorry for the preceding mis-threaded version. Here it is again :
> 
> I dont know if it is related, but I am actually failing an exemple :
> [EMAIL PROTECTED] matplotlib]$ ipython examples/pstest.py
> ---------------------------------------------------------------------------
> ImportError                               Traceback (most recent call last)
> 
> /home/cohen/data1/sources/python/matplotlib-svn/matplotlib/examples/pstest.py 
> in <module>()
>       2 import matplotlib
>       3 matplotlib.use('PS')
> ----> 4 from pylab import *
>       5
>       6 def f(t):
> 
> /usr/lib/python2.5/site-packages/pylab.py in <module>()
> ----> 1
>       2
>       3 from matplotlib.pylab import *
>       4 import matplotlib.pylab
>       5 __doc__ = matplotlib.pylab.__doc__
> 
> /usr/lib/python2.5/site-packages/matplotlib/pylab.py in <module>()
>     201 from numpy import ma
>     202
> --> 203 from matplotlib import mpl  # pulls in most modules
>     204
>     205 # catch more than an import error here, since the src could fail 
> too,
> 
> /usr/lib/python2.5/site-packages/matplotlib/mpl.py in <module>()
>       1
> ----> 2 from matplotlib import artist
>       3 from matplotlib import axis
>       4 from matplotlib import axes
>       5 from matplotlib import cbook
>       6 from matplotlib import collections
> 
> /usr/lib/python2.5/site-packages/matplotlib/axis.py in <module>()
>      12 from ticker import NullLocator, FixedLocator, AutoLocator
>      13
> ---> 14 from font_manager import FontProperties
>      15 from text import Text, TextWithDash
>      16 from transforms import Affine2D, Bbox, blended_transform_factory, \
> 
> /usr/lib/python2.5/site-packages/matplotlib/font_manager.py in <module>()
>      38 import matplotlib
>      39 from matplotlib import afm
> ---> 40 from matplotlib import ft2font
>      41 from matplotlib import rcParams, get_configdir
>      42 from matplotlib.cbook import is_string_like
> 
> ImportError: /usr/lib/python2.5/site-packages/matplotlib/ft2font.so: 
> undefined symbol: inflateReset
> 
> My config is :
> ============================================================================
> BUILDING MATPLOTLIB
>             matplotlib: 0.98pre
>                 python: 2.5.1 (r251:54863, Oct 30 2007, 13:54:11)  [GCC
>                         4.1.2 20070925 (Red Hat 4.1.2-33)]
>               platform: linux2
> 
> REQUIRED DEPENDENCIES
>                  numpy: 1.1.0.dev5077
>              freetype2: 9.16.3
> 
> OPTIONAL BACKEND DEPENDENCIES
>                 libpng: 1.2.22
>                Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4
>               wxPython: 2.8.4.0
>                         * WxAgg extension not required for wxPython >= 2.8
>                   Gtk+: gtk+: 2.12.5, glib: 2.14.6, pygtk: 2.12.0,
>                         pygobject: 2.14.0
>                     Qt: Qt: 3.3.8, PyQt: 3.17.4
>                    Qt4: Qt: 4.3.3, PyQt4: 4.3.3
>                  Cairo: 1.4.12
> 
> OPTIONAL DATE/TIMEZONE DEPENDENCIES
>               datetime: present, version unknown
>               dateutil: matplotlib will provide
>                   pytz: matplotlib will provide
> 
> OPTIONAL USETEX DEPENDENCIES
>                 dvipng: 1.5
>            ghostscript: 8.61
>                  latex: 3.141592
> 
> EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES
>              configobj: matplotlib will provide
>       enthought.traits: matplotlib will provide
> 
> best,
> Johann
> 
> 
> 
> Johann Cohen-Tanugi wrote:
>> hmm, I did not use matplotlib recently, but looking at the library, I 
>> would guess that I have the same issue :
>> [EMAIL PROTECTED] ~]$ ldd 
>> /usr/lib/python2.5/site-packages/matplotlib/ttconv.so
>>         linux-gate.so.1 =>  (0x00110000)
>>         libpython2.5.so.1.0 => /usr/lib/libpython2.5.so.1.0 (0x001c1000)
>>         libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00308000)
>>         libm.so.6 => /lib/libm.so.6 (0x0011f000)
>>         libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00148000)
>>         libpthread.so.0 => /lib/libpthread.so.0 (0x00154000)
>>         libc.so.6 => /lib/libc.so.6 (0x003f3000)
>>         libdl.so.2 => /lib/libdl.so.2 (0x0016d000)
>>         libutil.so.1 => /lib/libutil.so.1 (0x00172000)
>>         /lib/ld-linux.so.2 (0x001a4000)
>> [EMAIL PROTECTED] ~]$ nm 
>> /usr/lib/python2.5/site-packages/matplotlib/ttconv.so | grep 
>> _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
>>          U 
>> _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE@@GLIBCXX_3.4
>>
>>
>> Arthur M. Greene wrote:
>>   
>>> Hello Matplotlib users,
>>>
>>> I'm having difficulty generating postscript, and receiving an error that 
>>> I'm guessing reflects a version conflict, but I'm not sure exactly which 
>>> version of what needs to be changed. If I generate a plot (backend is 
>>> QtAGG, so I get a window), then click on the save button, I get a dialog 
>>> saying:
>>>
>>> /path_to/matplotlib/ttconv.so: undefined symbol: 
>>> _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
>>>
>>> Alternatively, if I do
>>>
>>> import matplotlib; matplotlib.use('PS'); from pylab import *
>>>
>>> the result is as follows (essentially the same error):
>>>
>>> exceptions.ImportError
>>> Traceback (most recent call last)
>>>
>>> /home/amg/<ipython console>
>>>
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/pylab.py
>>> ----> 1 from matplotlib.pylab import *
>>>        2 import matplotlib.pylab
>>>        3 __doc__ = matplotlib.pylab.__doc__
>>>
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pylab.py
>>>      290
>>>      291
>>> --> 292 from matplotlib.pyplot import *
>>>      293
>>>      294
>>>
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/pyplot.py
>>>       35
>>>       36 from matplotlib.backends import pylab_setup
>>> ---> 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
>>>       38
>>>       39 def switch_backend(newbackend):
>>>
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/__init__.py
>>>  
>>> in pylab_setup()
>>>       22     backend_name = 'backend_'+backend.lower()
>>>       23     backend_mod = __import__('matplotlib.backends.'+backend_name,
>>> ---> 24     globals(),locals(),[backend_name])
>>>       25
>>>       26     # Things we pull in from all backends
>>>
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/backends/backend_ps.py
>>>  
>>>
>>>       22 from matplotlib.font_manager import findfont,                      
>>>          
>>> is_opentype_cff_font
>>>       23 from matplotlib.ft2font import FT2Font, KERNING_DEFAULT,           
>>>  
>>> LOAD_NO_HINTING
>>> ---> 24 from matplotlib.ttconv import convert_ttf_to_ps
>>>       25 from matplotlib.mathtext import MathTextParser
>>>       26 from matplotlib._mathtext_data import uni2type1
>>>
>>> ImportError: 
>>> /home/amg/cdat4_1/lib/python2.4/site-packages/matplotlib/ttconv.so: 
>>> undefined symbol: _ZTVSt19basic_ostringstreamIcSt11char_traitsIcESaIcEE
>>>
>>> (The above backtrace is from iPython, but I get the same thing running 
>>> from plain ol' Python.)
>>>
>>> Googling suggests that this might mean I have a version of Matplotlib 
>>> that is too recent for the g++ compiler on my system, but I'm not really 
>>> certain. I'm running as an unprivileged user on RHEL4, with most of the 
>>> necessary libraries already present on the system. I've only had to add 
>>> qt and PyQt, which are installed in my home directory, where Matplotlib 
>>> can apparently find them. Version info is as follows:
>>>
>>> These are locally installed:
>>> Python 2.4
>>> qt-3.3.8b
>>> PyQt-3.17.4
>>> Matplotlib-0.91.2
>>>
>>> The following were already present:
>>> Kernel: 2.6.9-67.0.1.ELsmp, on i686
>>> glibc-2.3.4-2.39
>>> gcc-3.4.6-9
>>> tcl-8.4.7-2
>>> tk-8.4.7-3.el4_6.1
>>> freetype-2.1.9-6.el4
>>> libpng-1.2.7-3.el4_5.1
>>> zlib-1.2.1.2-1.2
>>> ghostscript-7.07-33.2.el4_6.1
>>> Output of 'gs --version': 8.50
>>>
>>> I tried switching to qt4/PyQt4, but then ipython -pylab hangs...
>>>
>>> Not sure what other info to supply; suggestions appreciated.
>>>
>>> Thanks!
>>>
>>> Arthur
>>>


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