How long will Google take to read my robots.txt after updating?

[Tintanus]

I updated www.egrecia.es/robots.txt two weeks ago and I still haven't solved Duplicate Title and Content on the website.

The Google SERP doesn't show those urls any more but SEOMOZ Crawl Errors nor Google Webmaster Tools recognize the change.

How long will it take?

[loopyal]

Hello Christian.

It depends on many things.

In my logs, I see four googlebots today. Each one has read the robots.txt at hourly intervals.

[Tintanus]

Thanks Alan, so to see the log you enter the cache version of the url?

[loopyal]

What I mean is the website logs:

66.249.73.219 - - [21/May/2012:21:50:58 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [21/May/2012:21:53:00 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [21/May/2012:22:05:33 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [21/May/2012:22:50:58 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [21/May/2012:23:01:31 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [21/May/2012:23:44:15 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [21/May/2012:23:50:58 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [22/May/2012:00:16:58 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [22/May/2012:00:46:02 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [22/May/2012:00:50:59 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [22/May/2012:01:24:08 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [22/May/2012:01:51:00 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [22/May/2012:01:51:17 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [22/May/2012:02:32:28 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [22/May/2012:02:50:59 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [22/May/2012:02:56:28 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [22/May/2012:03:40:58 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [22/May/2012:03:51:00 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.83.124 - - [22/May/2012:04:01:29 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
72.21.88.227 - - [22/May/2012:04:38:59 -0700] "GET /robots.txt HTTP/1.1" 304 - "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.206 - - [22/May/2012:04:43:06 -0700] "GET /robots.txt HTTP/1.1" 301 239 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.73.219 - - [22/May/2012:04:51:02 -0700] "GET /robots.txt HTTP/1.1" 200 435 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"