Hi Jerry,
Thank you for your response to my cry for help on the KVault-10. *I have done the power cycle probably 20 times, sometimes leaving it off for a few days. *It started doing this without me having loaded a new disc and without moving it. *It has done this once before, about a month ago, after which i powered it down and up, which solved the problem at the time, but this time round it appears to be more stubborn. I haven't loaded any new discs since the first time the problem occurred, so it might be one of the discs I inserted with my last batch! Which went OK through the import cycle, but might be thicker than the others and started giving problems.
I'm not sure whether other vaults normally do the same, but I have noted my vault cycles every now and then (appears to be random with a few days in-between). I suspect that these errors slip in when the vault goes through its cycle and it might contain a somewhat thicker disc that gets stuck.
Will really appreciate the instructions to open the vault. Have sent email.