Object corner not responding

[DavidacrossAmerica]

This object once had a rounded corner on it in InDesign, but I removed it. However, the curve will not go away. As you see here, that file is the only thing in the layer, and the corner is set to none. And yet, the corner is curved. It is a PSD file, but it is not curved in Photoshop. The photo is larger than this with square corners. What else can I do?

[James Gifford—NitroPress]

Keep in mind that you can apply effects, borders, corner mods etc. both to a graphics frame and to the graphic it contains. Check both, separately.

[Jeffrey_Smith · Accepted solution]

The frame most likely has a point added to it. You can use Object > Convert Shape > Rectangle to restore the frame and eliminate the corner.

[DavidacrossAmerica]

That did it though I have no idea how the frame got the corner. Thank you. 

[Willi Adelberger]

Maybe that it is not a corner effect but a rounded corner.

Go to Object > Convert form > Convert to rectangle 

to get a clear form.