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Hi,

I am trying to access or transform a marker from global coordinate system to body-frame reference. Unfortunately when I call functions such as marker.getParentFrame(), marker.getLocationInGround(state) etc, in the inverse kinematic step, it always throws an exception.

The errors I get state: InverseKinematicsTool Failed: Component has no underlying System.
You must call initSystem() on the top-level Component (i.e. Model) first.

or WaistLFront[error] InverseKinematicsTool Failed: Socket parent_frame of type PhysicalFrame in / of type Marker is not connected.

How do I fix this?

Thanks

Hi, call "model.initSystem()" first.

Hi,

I do call the function but I still get the error. In the osim file, there is no parent frame but socket parent frame. Is that an issue ?