Edge degenerates into point
 

Hi everybody, I got a very unusual trouble with gambit: I have to connect two vertex in a edge, which would result in about 0.4 mm length. But gambit decides that it can't connect them, giving the following error: <<the edge degenerates into a point>>.

I try to search in defaults menu for the correct option to change but I can't find anything...

Can anybody help me?

Thanks in advance

check if you don t have superposed points