As of a few days ago, my "Object Selection Tool" has stopped working. Magic and Quick work as they always have, but for some reason, when I go to Object Selection the same error message appears every single time.
"Couldn't find an object to select. There might not be enough edge contrast, or the object might be too small."
I have to crop out garments from white backgrounds nearly every day for my job so it is not like the images have altered or differed for there to be an issue that way.
I have tried resetting the tool, messing with the "Sample All Layers", "Hard Edge" etc, but nothing seems to work.
Can you post a sample image for us to test? And show a screenshot of the options bar for your Object Selection tool?
I've attached an image of a Mascot Workwear garment. I could go through 20 odd of these some days where it's just the white background that needs removing. I find that Object Selection is the neatest way to do this without drawing around with the Pen Tool, something that I don't have time to do. And Quick or Magic can sometimes be a bit messy on the edges so they are no good in the longterm.
The Object Selection tool works fine here on your image. Since resetting the tool didn't work for you, you might have to reset preferences. If you do it manually, you can restore the file if it doesn't work.
Scroll to the heading "Manually".
Select Subject will give you better edges here and you can also make an action out of it...
Select Subject will give you better edges here and you can also make an action out of it...By @Earth Oliver
Select Subject is another option, Earth, and it's good to mention.
In this case I got clean edges with the method @SmythKinsella asked for help with. Both are viable choices, depending on the subject.