Have I read the related troubleshooter articles above before posting (which pages?)? yes
Have I searched the tickets before posting? yes
Have I read the documentation before posting (which pages?)? yes
Joomla! version: (2.5.11)
PHP version: (5.3.25)
MySQL version: (5.0.95)
Host: (optional, but it helps us help you)
Admin Tools version: (2.5.6)
When trying to update to Joomla 2.5.12 an error stops the process:
The archive file is corrupt, truncated or archive parts are missing.