Have I read the related troubleshooter articles above before posting (which pages?)? yes (Troubleshooting joomla update)
Have I searched the forum before posting? Yes
Have I read the documentation before posting (which pages?)? Yes (https://www.akeebabackup.com/documentation/admin-tools-docs/updating-joomla.html)
Joomla! version: 1.6.6
PHP version: 5.2.17
MySQL version: 5.0.92-community
Host: Ace-Host
Admin Tools version: 2.1.14 - Pro
Description of my issue:
Hello,
Experiencing the dreaded Unknown Joomla Core issue. Trying to upgrade a 1.6 built site to 1.7 prior to launching. I feel I have thoroughly searched the site. I have ensured ports 80 and 443 are fully open. I have made sure cURL is enabled. We have added 174.136.7.91 and 206.123.111.164 (found on a forum post) to the firewall as well as the domains suggested in the documentation.
I am hoping to get any more suggestions that may help. I feel that I have tried everything that I could find on this site. I am experiencing this issue on 4 sites that I manage running Admin Tools Pro on 2 different hosting companies and 3 different servers. When I purchased Admin Tools in May it was working fine. I first noticed this issue in October. I was told by my hosting company that there have been no modifications to the firewall.
Hoping that any additional suggestions can be provided. Are there any known conflicts with other Joomla components that can cause this issue? Wondering if I need to revert to a previous version...perhaps the one I am using will not recognize 1.6?
Thank you for your time and I appreciate your help!