Gain Tuner Crash – Missing `_joints` Attribute**

I encountered an error while using the Gain Tuner extension after loading a manipulator.

  • When I clicked to use the tuner, Isaac Sim threw an AttributeError:

    AttributeError: 'GainTuner' object has no attribute '_joints'
    
  • The error points to this line in gains_tuner.py:

    for joint in self._joints.values():
    
  • It looks like _joints was never initialized before this method (compute_joints_acumulated_inertia) was called.

  • I already had a robot loaded, so the issue seems to be internal to the extension.

  • Please see the attached screenshot for the full trace.


Let me know if you’d like to include a version number or path details.