How to draw spline with CAM software (no vector)

Hi.
I'm new with CNC and I recently build a Sphinx 55 one. Now, I trying to draw some chart inside wood.
This work well, but I've got some trouble with spline line. Each time I try to import a SVG with spline, the CAM software close the spline when i generate a toolpath.
What i would like to do is tell to the software to only draw the line i provide (previously made by inkskape for example), not using a close vector, but just a line.
Is it something special to set when I configure the Toolpaths, to just follow the spline, without try to close the shape ?

Regards.

 

Thank you for the reply.
Here my SVG file.