Fails with the following traceback:

C:\Python23\Lib\site-packages\roundup>python demo.py
Traceback (most recent call last):
  File "demo.py", line 15, in ?
    from roundup.scripts import roundup_server
  File
"C:\Python23\Lib\site-packages\roundup\scripts\roundup_server.py",
line 3
2, in ?
    from roundup.cgi import cgitb, client
  File
"C:\Python23\Lib\site-packages\roundup\cgi\cgitb.py",
line 10, in ?
    import sys, os, types, string, keyword, linecache,
tokenize, inspect, cgi
  File "C:\Python23\lib\tokenize.py", line 38, in ?
    COMMENT = N_TOKENS
NameError: name 'N_TOKENS' is not defined

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it works for me. 

have a look at C:\Python23\lib\token.py and see if it
defines N_TOKENS. If it does, some other token.py shadows
the standard lib file.

I once had the same problem but only vaguely recall the
context. I think I installed some windows readline library
for python.

stefan.

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... and the offending module is token.py in the roundup package.

Ricardo, you must run C:\Python23\Scripts\roundup-demo.bat,
not C:\Python23\Lib\site-packages\roundup\demo.py 

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The docs need to be updated since "python demo.py" is the 
widely-advertised method of running the demo script. 

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"python demo.py" must be run from *source* distribution;
installation.txt does have a note on that.