dup => 'Sorry, this is a duplicate',
dx1 => 'Frequency $_[0] not in band (see show/band); usage: DX [BY call] freq call comments',
dx2 => 'Need a callsign; usage: DX [BY call] freq call comments',
+ dx3 => 'The callsign or frequency is invalid',
dxs => 'DX Spots flag set on $_[0]',
dxu => 'DX Spots flag unset on $_[0]',
e1 => 'Invalid command',