To Enable ECExpressions Support

ECExpressions are updated using applications such as Bentley Class Editor, or OpenPlant Project Administrator.

Follow these steps to update ECExpressions using OpenPlant Project Administrator.

Install or upgrade the iModel using OpenPlant Project Administrator CONNECT Update 10. For more information, see "Installation" in the OpenPlant CONNECT Edition Readme.
If the upgrade message is still visible after upgrading the iTwin, Reset Data Manager.