I have tried using a multiple scan option for this, but it's very tricky, and would take a long time to explain to a beginner. Of course they could be fixed, but in this complex image, it would take a good bit of work. But it tends to create sort of knot-like areas at intersections.

There is a centerline trace option (if you use 1.0beta - or for an earlier version, you can install an extra extension).

I'm not sure if Inkscape has something to give you the kind of results you need, for such a small and complex image. To change it to blue, just click on the blue chip in the palette (or use Fill and Stroke dialog to configure a custom color). Instead, you got 2 paths (one inside and one outside the original line in the raster image) with a black fill in between. My best guess is that you did not get a single path as a result. If you could share your SVG file we wouldn't have to guess. Or at least, whatever options you used might not. (Multi-color images may give spotty results, with pieces missing.) Smooth or sharpen the image if needed, clean up spots and specks, crop the image, and save to bmp.Trace bitmap might not be working exactly as you expect. Get the and you can run it from anywhere.The procedure:1.-Take a screenshot of the text at a high zoom level, and paste into your favorite graphics editor.For best results, the image should be in bold dark color on a pale or white background, with good contrast and strong smooth lines. The is very handy.Inkscape, a free and open source drawing program, to create the bitmap tracing. But this little procedure is easy as can be, and only needs a few mouse-clicks to accomplish.You will need:A graphics editor to tweak and crop your source image.Irfanview (freeware ) is easy to use, and can automatically save screenshots in various formats. It can be used for images other than text.Tutorials about creating Scalable Vector Graphics (in a text editor!) can seem very complex, and Inkscape is mystifying for a new user like me. For example, a screenshot, or a page from a pdf document, or a logo created in a graphics editor.

Trace bitmap to vector inkscape