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From: Nobody <nobody@nowhere.com>
Subject: Re: Changing filenames from Greeklish => Greek (subprocess complain)
Date: Sun, 02 Jun 2013 11:22:03 +0100
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On Sat, 01 Jun 2013 08:44:36 -0700, Νικόλαος Κούρας wrote:

> CalledProcessError: Command '/home/nikos/public_html/cgi-bin/files.py' returned non-zero exit status 1 
>       args = (1, '/home/nikos/public_html/cgi-bin/files.py') 
>       cmd = '/home/nikos/public_html/cgi-bin/files.py' 
>       output = b'Content-type: text/html; charset=utf-8\n\n<bod...n position 74: surrogates not allowed\n\n-->\n\n' 
>       returncode = 1 
>       with_traceback = <built-in method with_traceback of CalledProcessError object>

The traceback indicates that files.py terminated with a non-zero exit
code, indicating an error.

And that's *all* that can be determined from the information which you
have posted.

If you want to solve the problem, you'll need to make files.py generate
useful error messages, then capture them.