A workaround:
1. Connect the ends of the walls to close a perimeter;
2. Generate a room inside;
3. Use Rooms Information to get the perimeter;
Like this: (in meters)
4. Select the room and use Edit points from Advanced Editing plugin to find the length between start-end walls.
Subtract 1933 - 299.3 = 1633,7 cm
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A computer program does what you tell it to do, not what you want it to do. Murphy's Law
When all else fails, read the instructions. Murphy's Law
If you don't like "AS IS", DIY. Dorin's law
