May anyone help me with creating new scene for Line following? I was trying to follow steps in a book, but program does not run well.

When I try to change line.bmp and generate new files line.obj and line.mlt. there is a problem with scale parameter in generating mesh from a bitmap.
(p. 546 ) "Linemesh /i:line.bmp /s:0.2".
When i use dot in scale there occur an error: "***Invalid scale parameter" when I use comma, it works. But if I run simulation, dimensions of lines are different (much bigger than I want to have). I am not sure where a problem is. I think there can be a problem with line.bos which is not generated.

Maybe would also help me, finging some other line following examples.

Thanks for help
Matus