Deleting / merge double lines

Bjorn ten Broeke

 Hi, 

I have a drawing with two layer (lines). I need to calculate the total length of the lines. 

The problem is that some of the lines overlap. So when I calculate the Sum, the length is to long. 

How can I merge/delete the overlap? 

Can somebody help me?

Louis_Verdonck

 Use the OVERKILL command to delete/join overlapping and double entities.