So you've confirmed that the select layer by attribute is definitely selecting your polylines.

Well here is a list of potential problems:

• Your polyline and erase layers are different coordinate systems
• The erase layer has a selection on it so it never clips the area you expect?
• The erase layer must be a polyline or polygon layer (i.e. higher geometry dimension)
• The select by attribute (9) in your model is not selecting what you expect

Finally would it be the correct understanding of you model is that you have your ESA layer, select the active polyines, erase some of these, reselect the inactive polylines and then attempt an intersection of inactive lines in an area of nothing which should produce nothing...

I think what would help is if you edit your question to include an image of what these ESA lines are (they mean nothing to me) and your erase layer.

So you've confirmed that the select layer by attribute is definitely selecting your polylines.

Well here is a list of potential problems:

• Your polyline and erase layers are different coordinate systems
• The erase layer has a selection on it so it never clips the area you expect?
• The erase layer must be a polyline or polygon layer (i.e. higher geometry dimension)
• The select by attribute (9) in your model is not selecting what you expect

Finally would it be the correct understanding of you model is that you have your ESA layer, select the active polyines, erase some of these, reselect the inactive polylines and then attempt an intersection of inactive lines in an area of nothing which should produce nothing...

So if I have understood your description and if everything was running as expected the black line that I have identified below based on image above would be what the intersect is returning?