[Simnibs-discuss] SimNIBS 4.0 beta1 charm command error: svg did not converge

Mo Chen mchen at umn.edu
Thu Aug 18 04:53:01 CEST 2022

Hi there,

When we tried to use the *charm* command with SimNIBS 4, it gave an error
and suggested to use the *--forceqform* option. We then used the following
charm command:

*charm subj T1.nii.gz T2.nii.gz --forceqform*
It kept giving an error of "*numpy.linalg.LinAlgError: SVD did not converge*

Below are the details:

Version: SimNIBS 4.0 beta 1 for linxu
OS: Ubuntu 20.04.4 LTS
Command: charm subj T1.nii.gz T2.nii.gz --forceqform

Error message:

*Read mesh collection:
pointsTransforming pointsRead mesh collection:
/data/m2m_M87144843/segmentation/atlas_level2.txt.gzRead mesh collection:
image-to-world transform from header information
mesh collection: /data/m2m_M87144843/segmentation/atlas_level2.txt.gz[
simnibs ]CRITICAL: Uncaught exceptionnumpy.linalg.LinAlgError: SVD did not

Any clue?

Mo Chen, PhD

Clinical Scientist
Neuroscience Research Program, Research Department
Gillette Children's Specialty Healthcare

Adjunct Associate Professor
Department of Psychiatry and Behavioral Sciences
University of Minnesota

Technical Consultant
Non-invasive Neuromodulation Laboratory
Brian Conditions, MnDRIVE Initiative
University of Minnesota

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