Did you find out why? I am having the same issue.
Edit:
Mine got solved this way:
PHP Code:
def print_version(self, url):
print url
if url.find('/Journal/article.asp?HH_ID=') >= 0:
return self.browser.open_novisit(url).geturl().replace('/Journal/article.asp?HH_ID=', '/Journal/Print.asp?Id=')
elif url.find('/News/article.asp?HH_ID=') >= 0:
return self.browser.open_novisit(url).geturl().replace('/News/article.asp?HH_ID=', '/Journal/Print.asp?Id=')
elif url.find('/Resources/TechLib.asp?HH_ID=') >= 0:
return self.browser.open_novisit(url).geturl().replace('/Resources/TechLib.asp?HH_ID=', '/Resources/PrintRessource.asp?Id=')