[cutting_optimizer] fails no nest

[vmario89]

The following file does not work to nest - why? it doesnt make any change if the content is saved as a file or not (just a temp canvas).

There was no SVG output generated. Cannot continue. Command was:

/home/himbeere/.config/inkscape/extensions/mightyscape-1.2/extensions/fablabchemnitz/cutting_optimizer/CutOptim --file /tmp/selection3869.svg --unit=mm --distance=0 --max_length=1000 --optimizing_level=1 --firstpos=CL --free_rot=true --angle=180 --nested=true --use_cache=false --rect_cost=0 --debug_file=false --layer_output 0 --output /tmp/cutoptim.svg