sgesvd returned error

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1

Dear experts,

For many datasets I was running "mne_do_inverse_operator" and it worked
fine. Today I hit a problem with the SVD of the weighted forward solution.

When I run the command with the same input with the eeg option everything
works fine. But when I try to generate the MEG inverse operator I get the
following error:

SVD.sgesvd returned error: 54

Do you have any ideas how to solve this problem?

Thanks,

Alex

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2

Hi Alex,

Have you checked that your noise covariance contains reasonable values by loading it to Matlab or Python?

- Matti

3

Hi Matti,

Thanks for this hint. The data matrix of my current noise covariance
contains from -2*10^-10 to 6*10^-10 which is much smaller than in an older
matrix with values in the range of -9*10^-6 to 2*10^-5.

What really confuses me, is that it is working for the EEG inverse operator.
Can you explain that?

Thanks,

Alex