Because of changes made to JTable, CLI and other stand alone applications that use JTable break in Joomla 3.1.3 and later.
This is because you now must also load the legacy and cms libraries in order to work with JTable.
Adding this code to your application should fix the issue.
jimport('joomla.observer.mapper'); jimport('cms.helper.tags'); jimport('cms.table.corecontent'); // Categories is in legacy for CMS 3 so we have to check there. JLoader::registerPrefix('J', JPATH_PLATFORM . '/legacy'); JLoader::Register('J', JPATH_PLATFORM . '/cms');
You may also need to load some other classes Hot fix.
The hotfix at this location can also be applied if you do not want to or cannot modify your application.