Gui coordinates not responding, what am I doing wrong?

[Sietse Achterop]

Hello list,

I have a model that, when loaded in OpenSim, makes the coordinates of the GUI completely unresponsive, the view on the model is not changed at all!
Using the IK- or CMC tool does work; playing the result seems to work, but NO change whatsoever can be seen in the visualizer window.
The view on the model can be changed however: zoom, pan etc.
There is no error or warning.

Please find the model and python files that make it attached.

rower.png (67.36 KiB) Viewed 291 times

Think rower in a boat. The model consists of 5 non-weld joints and a weld constraint.
The boat is a brick only connected to ground using a sliderjoint.
The footstretcher is welded to ground, and the seat is connected to ground using a sliderjoint.
The weld-constraint is between the 2-halves of the lower leg.

The gui can be made to work in different ways:

• Change the sliderjoint on the boat into a WeldJoint. But then I get "Not enough degrees of freedom" from ipopt.

• Change the silderjoint on the boat into a FreeJoint.

• Remove the weld-constraint

So, why is are changes to the model using coordinates or playing a simulation not shown?

Thanks in advance, Sietse

PS. This both on Linux and Windows.

Updated: I forgot that I reported this already as issue 1337 on opensim-gui. It still is open.