Select by location source layer not enabled

Question

I have a polygon created using "Points To Line" and a large array of points extracted from a raster. Both the polygon and the point array have the same coordinate system and display properly.

I also have a RELATE between the two defined.

When I go to so a "Select By Location", the source layer pulldown allows me to select the polygon, but the "Use Selected Features" box is grayed out and it says "0 Features Selected"

See attached.

It allows me to run a selection, and the spinning wheel runs for a while, but no records in the point array are selected.

I've tried defining the polygon by KML conversion and the same thing happens

Suggestions?

Thanks in advance.

Select By Location.JPG

HankArnold · Accepted Answer

OK, I found the solution in case it helps someone else.

What I thought was a polygon was actually a closed group of lines

I should have known because it didn't show as a filled object on the screen.

"Features To Polygon" closed it, filled it, and allowed it to be used with a "Select By Location" quest.

The "Use Selected Features" is still gray, so that had nothing to do with the problem