[dm-crypt] Command failed with code -1 (wrong or missing parameters)

Hello,

I am getting this error, when trying to luksFormat my disk partition:


  # cryptsetup -v luksFormat /dev/vda3

  Are you sure? (Type uppercase yes): YES
  Enter passphrase for /dev/vda3:
  Verify passphrase:
  Existing 'crypto_LUKS' superblock signature on device /dev/vda3 will
be wiped.
  Existing 'crypto_LUKS' superblock signature on device /dev/vda3 will
be wiped.
  Command failed with code -1 (wrong or missing parameters).


does anybody know what that means, and how to fix it ?

thanks,