Constraints defined by?...

[jnordling]

highlighted Lines and Dimensions can't be satisfied.

I have created a toposurface of a site and am simply trying to add a pad for the building and split the surface for a road. Everytime I "finalize the sketch" I get the error message above. Any ideas would be appreciated. I have attached the file for comment. At this point, I have simply traced the pad and road locations as lines from the original AutoCad background link.

[Allen Lacy]

I think that your file is corrupt . I get the same results as you, so I copied and pasted lines, topo and property lines into a new file and it seems to work fine.

[jnordling]

Thanks Allen! I tried opening a new drawing and traced the contours over, but with the same results. I'm wondering if the AutoCad drawing from the surveyor caused a problem with the Revit file. Is this possible even after I have removed the AutoCad file from my Revit file? Thanks again.

[Dimitri Harvalias]

You have to be careful when tracing an ACAD drawing. Some lines may be placed in 3D orientations and that can really foul up a sketch.

[OKA_BIM_Man]

I just had the same error in Revit 2016 build 16.0.1144.0. I was creating a floor and traced a 3D CAD survey file in my sketch. It worked for the road but when I tried to copy and paste a road island into a "grass" floor island sketch, I got this error. Thanks to Dimitri, I realised it is to do with the 3d cad file. I solved this by:
1. editing the road sketch and copying the island sketch to the clip board
2. instead of pasting it directly into the "grass" floor sketch, I first used the Detail Line command and then used Paste Aligned. You can paste lines from floor or topo sketches to detail lines and vice versa.
3. I edited the grass floor sketch and used the pick line tool, hover over the detail line and clicked TAB to select all the detail lines > Finish sketch. This worked without the error.
Don't forget to delete the detail lines...
Cheers