Unbound variable floating-sel Help!

[Pocholo]

Thank ofnuts for the explanation. I took a second look and I found what I did wrong. When I created a "selection" on the image and I filled the selection, I forgot to "Select> None". Somehow when I rotated the image without getting rid of the selection, it created a floating selection that I could not got rid off. I manage to do (gimp-selection-none img) and then rotate the image and that worked.