Error - Could not transform the path in Photoshop

OMG  thank you thank you thank you a thousand thank yous.  Yes, this was the answer. I couldn't transform subject on my layer and I put "couldn't transform on layer no pixels" in search and there you were. I did click on the pen, deleted path like you said and layer cleared for transform. I'm getting my photos ready for a major contest and I couldn't modify layer due to freeze of transform. So grateful.

maaaaaaaaaaaan thank you it has troubled me for an hour 

it's really helpfull, thank you so much

You can also easily delete path by this way;

1. open paths tab from window>paths

2. right click on path in that tab

3. delete path 🙂

So i had this issue and it turns out it was because i had multiple pictures open to copy and paste and the selection box was still active on the picture I was copying from. Once i deselected there, I could transform again on the photo i was working on

Worked like a charm...Awesome this is on here..Thanks so much!!!!!

Press ENTER to close that path ->DONE , somewhere when you press P , you make a path without closing it and it appered a small x in your screen , just Enter and you done .

Can you post a screen shot of what you're trying to do?  If you're resizing an image, it doesn't matter if paths have pixel.  Normally you get an error like that when you have a selection made that does not have any pixels and you're trying to transform the selection.