Tcl wasn't installed properly

[Steve]

On Mar 10, 11:30 am, Steve <skrip... at gmail.com> wrote:
> On Mar 10, 11:00 am, MRAB <pyt... at mrabarnett.plus.com> wrote:
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> > On 10/03/2011 15:39, Steve wrote:
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> > > I'm a frequent user of matplotlib on my Windows XP machine.  I
> > > recently attempted to install a program that modified my Tcl
> > > installation, and I now get an error message when I attempt to plot
> > > anything in matplotlib.  Here is the error message:
> > > ---
> > > Traceback (most recent call last):
> > >    File "<stdin>", line 1, in<module>
> > >    File "C:\Python25\lib\lib-tk\Tkinter.py", line 3758, in _test
> > >      root = Tk()
> > >    File "C:\Python25\lib\lib-tk\Tkinter.py", line 1647, in __init__
> > >      self.tk = _tkinter.create(screenName, baseName, className,
> > > interactive, want
> > > objects, useTk, sync, use)
> > > _tkinter.TclError: Can't find a usable init.tcl in the following
> > > directories:
> > >      {C:\Program Files\Tcl\lib\tcl8.3} {C:\Program Files\Tcl\lib
> > > \tcl8.3} {C:/Prog
> > > ram Files/Tcl/lib/tcl8.4} C:/Python25/lib/tcl8.4 C:/lib/tcl8.4 C:/
> > > library
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> > > This probably means that Tcl wasn't installed properly.
> > > ---
> > > I attempted a complete reinstall of python (hoping it would reinstall
> > > Tcl with correct file paths), but I get the same error.  Any
> > > suggestions would be appreciated.
> > > Thanks!
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> > In my installation Tcl is in "C:\Python25\tcl", if that helps.
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> That is where my installation is located too.  Why is it insisting on
> looking in "C:\Python25\lib\tcl8.4"?  Can I change where it is looking?

I figured out the solution.  The program I installed must have changed
my windows path names.  I changed TCL_LIBRARY and TK_LIBRARY to the
location of my tcl installation, and it works fine now.