Problem vertexCount > 60000 UnityEditor.DockArea:OnGUI()

Unity 3 : I have a file which is about 150000 thousand vertices, a few architectural blocks, and it is separated in ten parts according to materials, nothing exceeds 60000 thousand vertices. But when i click the object in the editor, it shows me this message. vertexCount > 60000 UnityEditor.DockArea:OnGUI()

Everything works fine collisions, objects, nothing disappears , and the project compiles perfectly. What is that message ? I have the impression that is related with the collision mesh and the way it is displayed in the viewport... should i ignore it ? I wouldn't like to break the file in two parts. Thanks in advance

Unity also count UV verticies so if you done some unwrapping this may cause that error to pop out.
Modelling packages like 3DS Max usualy display only visible verticies. you must remember that at point where you have unwrap island defined there are not 1 verticie but 2 or more, depending on how many channels you done unwrapping. Unity will import only mapping for channel 1 and channel 2 which is usually used for ligthmapping unwrap.