Undefined index: distribution_name in drupal_install_profile_distribution_name() (line 207

Notice: Undefined index: distribution_name in drupal_install_profile_distribution_name() (line 207 of /home/folder/public_html/folder/includes/install.inc).

Solution:
Go to includes/install.inc and change line 207:
http://www.drupaldeveloper.es/en/notice-undefined-index-distribution-name-in-drupal-install-profile-distribution-name-line-207