Panasonic DMR-E100H problem with Taiyo Yuden blanks

I've had the DMR-E100H for about three years, though I've only been
using it substantially for the last 18 months. Recently it has started
sometimes responding "NO USE" when I try to dub a program from the
hard drive to a DVD-R. As a rule I use Taiyo Yudens, but whn I have
got this reaction I have tried other disks and the same thing happens.
Thus far I have found that after a day or so I can ty again and the
problem goes away, but I'm worried that it may be a sign of decline.
Has anyone else had a similar problem? I've never seen the phrase "no
use" before.

Michael

Michael