Hi @tookemtoni ,
You can use this dxf. See attached.
Supplied utility runs ok here, that error message does not look as Fusion native.
Imported DXF are never constrained or dimensioned.
471 articles to constrain before dimensions might take a while.
Might help...
Hi @tookemtoni ,
Agree with @davebYYPCU .
The .dxf file has lot of overlapping sketch entities.
Clean the overlapping sketch and then try to apply auto constraint again.
FYI: We do not run AutoConstrain on sketches having more than 250 entities