HaroldL
Alibre Super User
Well this is weird. I just opened my drawing and checked that the section line was at 1" per the tutorial. (I recall that I moved it to see if a different location would make a difference as well as added another reference plane and profile to the model at the location of the moved section line.) I then deleted the section view and recreated it as a Removed section and now am able to apply the dimension. ( I thought I did create a Removed section at one time but could not dimension it. )Harold,
2 things
1. your section line was not in position called for in the exercise.
2. your section view was not a removed section views as called for - not really sure why that should make such a difference, a 'standard section view' looking in the opposite direction does allow dimensioning.
REMOVED SECTION VIEW
I'm just guessing here but I think that the Removed section will only create the geometry at the cutting plane line while the standard section will create the geometry at the cutting plane line as well as all that is viewable in the direction of the section arrows. Because the loft is not perfectly straight there may some circular geometry that is projected into the view and is confusing Alibre and thus cannot figure out what to dimension.
This is something worth remembering the next time there is a section view that cannot be dimensioned.
STANDARD SECTION VIEW