Posted by Land Owner on Aug 24, 2022; 2:36am
URL: https://forum.librecad.org/LibreCAD-Failed-at-First-Hurdle-tp5722002p5722005.html

Draw the box exact from the start.  Here are three (3) ways to the same box:
 
OPTIONS ==> Current Drawing Preferences ==> Paper, Units, Grid, etc.

LINE ==> 2 Points
Specify first point
0,0
Specify next point
120,0
Specify next point
120,150
Specify next point
0,150
Specify next point
0,0
 
Or

LINE ==> 2 Points
Specify first point
0,0
Specify next point
@120<0
Specify next point
@150<90
Specify next point
@150<180
Specify next point
0,0

Or

LINE ==> RECTANGLE
Specify first corner
0,0
Specify second corner
120,150

It is now exact.  Aligned Dimensions will confirm.
Done