Hello@tous
I am facing a dimension problem in relative views, after changing the model dimensions (length for example) all the dimensions of the relative view in the plan disappear,
Do you have an idea to remedy this?
Thanks in advance
Would a screenshot be possible to understand the problem?
And also SW and SP versions.
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Hello sbadenis, and thank you for taking the time to answer me:)
Attached is a screenshot.
The version is 18sp1
Tried on another session, another independent workstation 18, and a 16 but without success,
(I specify that it is only for rooms with any orientation, the dimensions of the relative views simulating the standard projections always appear)!
vue_relative.png
Hello
Is there a link (same odds per equation, equal line etc...) between the left and right sides?
EDIT: could you share the file with us to test in order to better help you
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Hello Nicolas
Attached is the part in question sw18, if you can test it would be nice of you 
Pièce1-1.zip (138.7 KB)
Hello
So I looked a little bit and it can come from several things. I have a few questions:
- On your 2 views (left and right) how did you create your odds? Did you add them with smart dimensioning in the drawing? Or did you add them with the "template objects" function? (you can test with object of the model, it recovers the dimension of your 3D sketch, so no more risk that the dimension disappears)
- I noticed that your square was not parallel to the front plane so I would like to know how you created the view that is located to the right of your drawing because it can come from that if you rotated the view. When re-lengthening your square, the view rotation function can cause you to lose the points you have selected for the dimension, and so if it loses the points, it loses your dimension and it disappears.
I'm annoying 
, but you can make us follow your format. SLDDRW to test
++
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I just attached the plan (previous msg)
The dimensions are ordinary, not imported.
For the view, it's insertion >mep view>relative to the model.
What does it look like if you modify a model coast?
I have the same problem, the rating disappears... it doesn't seem to come from the version because I'm with SW2019.
I feel like it comes from the creation of the view. In fact as your view is relative to the room, each time you update a value, it changes the angle of your room in space so the view " regenerates ", I don't know if it's clear... 
I don't see how to do it without the relative view... 
But I found a trick: in the drawing, you convert the 2 extreme edges into a sketch, and you add your dimension to the lines of the sketch. The only drawback (which I didn't manage to solve) is the view that shifts in the drawing when you change length...
Otherwise you have the possibility to add a table that gives you the length of your square:
Inserting / Tables / Welded Parts List
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Yes I noticed it for the sketches but I don't really appreciate the entity conversion, I find that it's a double job (constraint management, layers etc ...) ,
The painting doesn't suit me, it's a definition drawing,
pity that it is thus limited 
Thank you Nicolas
Sorry I didn't help you more than that... the others will have other solutions 
After that, maybe if you rework your sketch to make sure that the orientation of the face you're measuring is always on the face plane, in my opinion your problem will be solved 
Hello
I prefer the idea of @Nicolas74 : you have to make sure that the front panel remains parallel to one of the basic planes. To do this, you need to modify your 3D sketch so that the hypotenuse of the 700x700 triangle is always along the X axis, you need to replace the constraints following X and following Y which must exist by a perpendicularity constraint between the 2 sides of the triangle.
Hello stefbeno
The proposal doesn't suit me, the parts (body) come from a welded structure where the elements are arbitrarily positioned (and oriented) in space, thank you anyway