Block Error Solver Configuration: An implicit 6-DOF joint is attached to a degenerate mass distribution.
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Christopher Dadswell 2015년 4월 7일
Hi, a reply now probably isn't very useful to you but hopefully it may help someone else. I've been encountering the same problem recently while trying to build a simmechanics model of a quadcopter and have been bashing my head against a wall trying to find a solution.
Whenever I tried to specify a torque to drive a revolute joint I got the 'degenerate mass distribution' error and no amount of reorganising of the model or changing parameters seemed to be able to make it work.
Eventually I tried changing my solver settings and it finally works. It seems that for whatever reason you just need to have a very small step size to make the model run. I'm currently running a fixed step ode5 solver with step size 0.0001 and it runs and behaves sensibly, just a veeery slow simulation.