Removing blueprint gone wrong?

    Hi


    I have been using blueprints from the public forum on my server, and untill today it has been going fine.


    Occasionally when I use undoblueprint, a 'mirage' is left behind, like a picture remains of the building.
    But if i log out and in again it is gone.


    Except for today.


    Part of the building was still there when i logged on, now solid.
    Is there any way to remove it quickly?
    Console command or similar?


    I tried tearing it down and using tnt, but tnt is not very effective.
    Tearing it down manually takes forever. There are thousands of elements.


    Any ideas?