Man at B&Q wrote:
On May 4, 8:58 am, John Williamson
wrote:
I must remember to tell the makers of my cameras that. They tell me
under no circumstances must I take the batteries out while it's writing
to the card, as that may render the card useless.

My point stands.

The warning, "may", is due to potential corruption of the card's file
system that isn't designed to be robust enough to withstand corruption
of a single critical memory location. The data is still there if you
have the right tools to recover it.

Not always, IME, but you may have been luckier. Luckily, the camera with
a problem was one used by a member of a group, so they just swapped
pictures.

--
Tciao for Now!

John.