singular matrix in TrackBestTrackCreator with VeloClusterTrackingSIMDFull
when running with VeloClusterTrackingSIMDFull
the following error is thrown in rare cases. A minimal reproducing example is attached.hlt2_fast_reco_singularity.py
TrackBestTrackCreator FATAL Standard std::exception is caught
TrackBestTrackCreator ERROR singular matrix
This error only seems to appear when running with VeloClusterTrackingSIMDFull
, necessary for example for Velo alignment, which allows Velo tracks with hits on both modules of the same station.
A possible cause could be that tracks are created only from hits from modules of the same station, resulting in a track almost perpendicular to the beam line.