And now you know what to do if it happens again...which it shouldn't. I've got 2 HP-1's, one in my car and one at home.
I've had to reseat the memory card a couple of times out in my car, as the bumps in the road sometimes loosened it.
I went so far as the place a piece of tape over the card to hold it in place. Another tip.
Once, I had to reprogram my base unit like this, too. Just the hazards of digital life, no sweat. DUKE, WB9OJD