So, I have had this issue for some time now and have been finding work arounds. I cannot for the life of me figure out this issue so maybe someone here can help....
When I export a 2D linework file from TBC or MicroStation and put it into access or scs (same problem in both programs) I can select on all the tangent lines but some of the curves are grayed out and cannot be selected? I have made sure that all linework is 2D I have linked them together, redrawn them and nothing works. When I redraw the curves, some will now work where other that worked previously now do not. Please help, I am going crazy!