RRA Singular Matrix

[Laura Peeters]

Hi Xiaoqin and Michael,

Did anyone of you find a solution yet on your problem Xiaoqin? I'm having the same problem and I don't know what is going wrong and how I have to solve this.
"Assembly error tolerance achieved: 6.17791923304342e-12 required: 1e-009"

Thanks!

[Zakia Hussain]

Hi everyone

I was referred to this old post on OpenSim forum since I am facing the same issue as Andrew when i do RRA as well as body kinematics using Analyze tool. i checked all bodies have mass/ inertia. I am including my model as well.

Code: Select all

java.lang.RuntimeException: SimTK Exception thrown at SmallMatrixMixed.h:879:
  Error detected by Simbody method lapackInverse(Mat<>): Matrix is singular so can't be inverted (Lapack getrf info=5).
  (Required condition 'info==0' was not met.)

	at org.opensim.modeling.opensimActuatorsAnalysesToolsJNI.AnalyzeTool_run__SWIG_0(Native Method)
	at org.opensim.modeling.AnalyzeTool.run(AnalyzeTool.java:161)
	at org.opensim.tracking.AnalyzeToolModel$AnalyzeToolWorker.construct(AnalyzeToolModel.java:139)
	at org.opensim.swingui.SwingWorker$2.run(SwingWorker.java:130)
[catch] at java.lang.Thread.run(Thread.java:748)

Any help will be much appreciated.

Thanks