I do have the font Inconsolata installed in my system fonts directory: C:/WINDOWS/Fonts/inconsolata.otf.
Nevertheless when I run the following document with lualatex the on-the-fly dialogs pops up and tells me that the otf is missing and wants to install the inconsolata package. When I cancel the dialog the compilation continues without problems and includes the existing system font.
This doesn't happen with xelatex. It includes directly the font in the system font folder.
I don't want to install a second version of the font in a texmf-tree! It would possibly confuse xetex.