Troubleshooting

Some common problems people may run into when using drivers.

Scripted Expression

../../_images/animation_drivers_troubleshooting_autorun-graph-editor.png — A security warning in the Drivers panel.

../../_images/advanced_scripting_security_autorun-scripts-dialog.png — An Auto-run warning in the Info editor's header.

By default Blender will restrict execution of Python scripts.

If using a Scripted Expression Driver Type that doesn't follow the Simple Expressions subset, you will have to open the file as Trusted Source, or set Auto Run Python Scripts in Preferences ‣ Save & Load ‣ Blender Files.

../../_images/animation_drivers_troubleshooting_autorun-file-browser.png — The Trusted Source checkbox in the File Browser.

../../_images/animation_drivers_troubleshooting_autorun-user-preference.png — The Auto Run Python Scripts checkbox in the Preferences.

Rotational Properties are Radians

Parts of the User Interface may use different units of measurements for angles, rotation. In the Graph Editor, while working with Drivers, all angles are Radians.