polygon-object contains unwanted faces


I did an architectural model in Rhino 3D and exported it as DXF. In Blender 2.42 I imported the model. Everything looks fine, but there are objects that seem to be merged together, although they should be separated.

How can I separate the faces so that this one object will be split up into 2 or more objects?

Does someone know where the problem lies?

PS:Is it possible to upload 2 explanatory screenshots?

Select your mesh & go into Edit mode. Hit the P key to seperate various parts . . . you can seperate by selected faces or all loose parts.

Hope that helps!

Thank you a lot! This works very fine.