Hello,
I’m novice on SketchUp and I would like find a good scale of my plan for start my work on it. I don’t understand why the tool of “tape measure” is purple. I have a message error and I can’t resize with the good distance between two points guide, the mouse cursor of tape measure become on the area dimension… I imagine that the reason is quite simple but I need some help 
- I search 142.70 meters between the two points guide
This video is the operation but I have a difficult… Sketchup : modéliser d'après plan 2D - YouTube
Summary
Scale plan Abbaye .skp (979.0 KB)
October 8, 2018
I’ll do my presentation on the forum ! Big hello from Paris
Thank you 
François
Francois, je n’ai pas bien compris votre probleme. Veuilez le repeter en francais, s’il vous plait?
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Thank you John this is exactly what I try. But I have a error message 
Simon, j’essaie de faire ce que John fait dans sa réponse. Quand je rentre la valeur (142.7m) entre les deux points guide voilà le message d’erreur :
I complete 142m but when I put 142.7 I have this message. My units of measure is : 
When I entered the decimal value => “Invalid length entered”
Try 142,7 instead of 142.7. It appears your system uses , instead of . as decimal separator.
2 Likes
Man, thank you very much lol it was very simply 

J’ai eu un autre probleme que je ne comprends pas bien. Je n’arrivais pas a trouver le point guide a l’intersection des deux lignes guides sans cacher l’image. Apres ca, tout c’est passe bien!
Merci pour ton aide simoncbevans 