ORD - Break/Split a 3d Linear Element

Hi Everyone,

I was hoping to understand how to break/insert gap/split 3D Linear Element Strings? See the attached

I'm trying to create a terrain from an imported mx genio file, however before I create this I need to remove the strings from the overpass above.

For some reason the standard Drawing-Modify Tools do not work. It appears that you can only break strings that have been created in ORD...

 

Any help would be greatly appreciated.

Thanks,

Glen