Posted by Mike Hayes on
URL: https://forum.librecad.org/Line-s-using-relative-coordinates-tp5712609p5712615.html

Hi Tony

I'm guessing that you're using the - sign as a separator between the feet and inches and not in the mathematical sense as the subtraction symbol.

If so, the correct equation would be ( 12 +(5 + 5/16))<0

Mike