I keep getting the following error when modeling a contact:
---- START: WARNING ----
The Integrator has detected a singular Jacobian matrix.
This problem may be caused by:
(a) A constraint equations that became almost redundant, e.g., the model
is at a singular configuration or at a bifurcation point.
(b) A massless PARTS in the model.
The Calahan Sparse Solver has detected an unexpected singularity at row 1271.
The corresponding equation is: Contact/Torque3D/39 Y Torque
A minimization algorithm will be used to find a solution on the
projected constraint manifold.
---- END: WARNING ----
There are multiple contacts in the model, many of which are identical to the one that I am getting the error at so I was wandering if there is any way to find out what is this singularity related to. I've already trying isolating it (by deactivating the other contacts) but I could not draw any solid conclusions.
The first thing is to double check the model has no massless parts. Then you could run the same simulation up to fraction of a second before the issue happens with a very short timestep and visualise/plot what is going on with that Contact. Alternatively is to run debug/eprint.
The first thing is to double check the model has no massless parts. Then you could run the same simulation up to fraction of a second before the issue happens with a very short timestep and visualise/plot what is going on with that Contact. Alternatively is to run debug/eprint.