Cannot read an undeclared property Nette\Http\FileUpload::$tmpName

dumpuju:

			dd($image);
			dd($image->size);
			dd($image->name);
			dd($image->tmpName);

výsledek:

1)
Nette\Http\FileUpload(5) ▼ {
   name private => "agro_venkov.jpg" (15)
   type private => "image/jpeg" (10)
   size private => 365512
   tmpName private => "/data/web/virtuals/7258/virtual/tmp/php5uDLDX" (45)
   error private => 0
}
2)365512
3)"agro_venkov.jpg" (15)

a na ,,tmpName " to hodí ten error, proč? Dyt je to stejné jako name i size, ne?