Problems moving walls in REVIT

I am trying to move some walls in a model and everytime I go to move them I get an error "Analytical model edge cannot have a length of zero (0)".
Has anybody else come across this error? Its stopping me from moving any wall in my model. Any help would be greatly appreciated.

When your moving your wall is another wall or object trying to move with it? It may be going to a 0' length and that is your error.