[Simnibs-discuss] simnibs 4: numpy singular matrix error

Oula Puonti oulap at drcmr.dk
Thu Jan 5 16:55:18 CET 2023


Hi Asif,

Could you maybe send the charm_report.html to support at simnibs.org so I
can have a look? Also if you're using a script to run the simulation
please include that as well.

Thanks,
Oula


On Mon, 2022-12-19 at 13:33 -0500, Asif Jamil wrote:
> Hello-
> 
> I’m using simnibs 4 to perform tDCS e-field simulation, and part of
> the pipeline is to calculate the E-field normal component on the
> fsaverage surface. 
> 
> For most of my subjects, the pipeline runs fine, however for one
> participant, I’m getting the following error:
> 
> [ simnibs ]INFO: Interpolating to the middle of Gray Matter
> [ simnibs ]CRITICAL: Uncaught exception
> numpy.linalg.LinAlgError: Singular matrix
> 
> Seems like this issue is related to there being a singular matrix. Is
> there a quick workaround to this error?
> 
> Thanks
> Asif
> 
> 
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