UPDATE!
i placed linkern.exe directly in the cygwin/bin dir and give --solver position the result is :

C:\Program Files\Inkscape>python\python C:\tspart.py --solver=c:\cygwin\bin\ C:\
dida1.pbm
Loading bitmap file C:\dida1.pbm ... done; 22293 stipples
Writing TSP solver input file C:\dida1.ol4o_b.tsp ... done
Running TSP solver ...
Traceback (most recent call last):
File "C:\tspart.py", line 253, in <module>
pipe = subprocess.Popen( cmd, shell=use_shell )
File "C:\Program Files\Inkscape\python\lib\subprocess.py", line 633, in __init
__
errread, errwrite)
File "C:\Program Files\Inkscape\python\lib\subprocess.py", line 842, in _execu
te_child
startupinfo)
WindowsError: [Error 5] Accesso negato

C:\Program Files\Inkscape>

after this i founded some file in c root and opened one in the concorde ui shell... now is computing!

What was the name of the file in your C root directory that was generated? Was it a *.tsp file?

Did you get a *.svg file generated too, or just the TSP file?

Do the links on http://code.google.com/p/polargraph/wiki/TspVectorArtOnPolargraph shed any light on this (specifically http://www.evilmadscientist.com/forum/viewtopic.php?showtopic=4728)?

Copy your TSP python files to your root C directory. Ie... C:\

Switch over to C:\Program Files\Inkscape directory first.

Try running this command, without the extra parameters that you were running before:

C:\Program Files\Inkscape>python\python C:\tspart.py C:\dida1.pbm

If you still get access errors, that has to be some Windows access issue or something like that. Try running that command and see what you get.

Aha! Thanks for updating us Giorgio, I had got stuck on that too (using the path instead of the path+filename for linkern), but assumed I was doing something _else_ wrong!

sn