Posted by Jim Thompson on Jun 14, 2014; 8:49pm
URL: https://forum.librecad.org/Accurate-dimensioning-problem-tp5710037p5710058.html

Rallaz wrote

Jim:

You are using "Dimension->Linear" instead of  "Dimension->Aligned" ?

Bingo!  You have solved it for me. That was the problem.
I'll now edit the post as "solved".
Thanks.