A rolling upgrade from 0.94.x directly to 0.98.x does not work. The upgrade path follows the same procedures as Section 3.5, “Upgrading from 0.94.x to 0.96.x”. Additional steps are required to use some of the new features of 0.98.x. See Section 3.3, “Upgrading from 0.96.x to 0.98.x” for an abbreviated list of these features.