I am following ine previous instructions to upgrade from 2.5.x to 2.5.28 in preparation to upgrade to 3.5. Install, DB steps went fine. 2 package updates were fine, but when I try to do Gantry to 4.1.33, whether through update or install, it throws this error:

Fatal error: Call to undefined method JInstallerPackage::getManifest() in /home1/someuser/public_html/joomlatest/tmp/install_599de020ec6ed/install.php on line 75
  • Post your issue at rocketheme support forum. – FFrewin Aug 23 '17 at 21:10
  • Rocketheme support forum seems to only be available for paid subscriptions. The site I am working on is for a non-profit club with very limited budget. – JimR Aug 25 '17 at 13:11
  • I have the same issue...have you found any solution? Thanks – musinfo Sep 29 '17 at 14:32
  • This question is also asked at: stackoverflow.com/q/45862812/1983389 – Neil Robertson Sep 30 '17 at 2:50

It looks like the last version of Gantry 4 that is supported on Joomla 2.5 is v4.1.32.

You can download Gantry v4.1.32 from:


Upgrade to Gantry v4.1.32, migrate your Joomla 2.5 website to Joomla 3.x and then upgrade to the latest version of Gantry 4.

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