Upgrade Problem to 5.6.1.2

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After performing an upgrade through the dashboard from 5.6.0.2 to 5.5.2.1, I got the error message:

Fatal error: Call to undefined method AddBlockBlockTypePermissionAccess::isPermissionKeyInUse() in /home/sites/atlantisleisure.co.uk/public_html/updates/concrete5.6.1.2_updater/concrete/helpers/concrete/upgrade/version_560.php on line 284

From the backed up database config table (ie PRE upgrade):
APP_VERSION_LATEST 5.6.0.2
SITE_APP_VERSION 5.5.2.1

Luckily I backed up everything before I tried the upgrade so I can restore the site but does anyone have any idea why this would have happened and how I can solve it? I want to upgrade but now I'm cautious. I have upgraded other sites without issue in the past but it's going to be a pain in the a**e to have to restore if upgrading fails in the future!

Any help gratefully received!!

ppisoban
 
DAkers replied on at Permalink Reply
Hey ppisoban,

You actually need to upgrade to 5.6.0 from 5.5.2.1 first. Then you can upgrade to the latest.