What does "unsupported medium size" plan when a photosmart printer say this?

What does "unsupported medium size" plan when a photosmart printer say this?

If you're referring to a rag error, then you're trying to communicate the printer to print on a paper size it's not designed to business deal with



If it's a medium card you can insert in the printer, next that's exactly it - it doesn't support that size media (it can't read it)
It vehicle get a hot printer.