'Quit renderer' for a long time WITHOUT result after call 'vmtkcenterlines' after 'source vmtk_env.sh' in Ubuntu

Community VMTK
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‘Quit renderer’ for a long time WITHOUT result after call ‘vmtkcenterlines’ after ‘source vmtk_env.sh’ in Ubuntu.
However, it’s very quick to Extract Centerlines in 3D Slicer with VMTK extention with the same .stl file
Thanks!