Hi, I have created a new TIN surface with data based on group of COGO Points (PNEZ from txt file). There is no additional surface definition excepting this one point group. Then I've tried to add a line in Edit Surface (AddSurfaceLine) trying to change existing triangle definition (swapping edges but with add line feature). Every time I've tried to do it, there "Error performing edit" pops out.
I need to add, I am not interested in adding breakelines instead of adding line, because it takes a lot of time do define all the breakelines and I'm also not interested in swapping edges, because it also takes to much time to finally get, what I need.
I've searched Autodesk Groups and have found similar topics but no one really solved the problem or concerned exactly, what I need. Is it a Civil bug or am I doing sth wrong.
I have previously made several surfaces the same way and it worked perfectly, I have also used the AddSurfaceLine command without any problems.
I have also reinstalled Civil 3d and it didn't help. I use Civil 3d 2012 with 2.1 SP.
