Known Bug in Extension Creates Errant Warning Messages
If you've installed the Revit 2018 extensions and are receiving a Revit Precast - Warning when editing other model elements (for example, making changes to a curtain wall), you're not alone -- this warning is caused by a known bug in the Autodesk Structural Precast Extension for Revit 2018.
Here's a simple workaround while we're awaiting a new version of the extension that fixes this bug:
- Switch to the Precast tab in the Tool Ribbon.
- Click the Off button to disable Structural Precast for Revit.
You can also uninstall the Autodesk Structural Precast Extension for Revit 2018 using the Start Menu > Settings > Apps & Features dialog.