I am trying to make a 2D topographic profile using the Interpolate Line tool and a DEM. I've done this before on a different project; not sure why it's not working now. The 3D Analyst extension is enabled, and I've selected the DEM I want to use. When I click Interpolate Line, the "cross-hairs" cursor pops up, but when I click on my two points to draw the line, nothing happens--no line shows up at the end of it.

What am I doing wrong?

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