Win8.1x64, 3x gtx580
Short description of error
When there is no external variables defined, the driver stops updating in the viewport dynamically. Updates only on more global events like frame change.
Exact steps for others to reproduce the error
- Grab/move the object in z axis. It curves proportionally to elevation via driver controlled modifier.
- In the selected driver, remove object reference from the defined variable or the variable itself.
- Grab/move of the object doesn't update modifier effect anymore although the expression is still valid.