Error: symeig_cpu: the algorithm failed to converge: 6 off-diagonal elements of an intermediate tridiagonal form did not converge to zero

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I am trying to use https://github.com/Michaelvll/DeepCCA

After 20-40 iterations, It gives the following error:

RuntimeError: symeig_cpu: the algorithm failed to converge; 6 off-diagonal elements of an intermediate tridiagonal form did not converge to zero.

Error is generated from https://github.com/Michaelvll/DeepCCA/blob/master/objectives.py#L46

[D1, V1] = torch.symeig(SigmaHat11, eigenvectors=True)

System Configuration:

  • Windows 10.
  • Python 3.7
  • Pytorch 1.2.0

How can I debug this?

torch pytorch python-3.x
1 Answers

I have come across a similar error. Its root cause was a failure in the Cholesky decomposition at some point down the road, because a tensor was singular.

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