def raise_error
      code = lib.tcidbecode( @db )
      msg  = lib.tcidberrmsg( code )
      raise Error.new("[ERROR #{code}] : #{msg}")
    end
def raise_error
      code = lib.tcidbecode( @db )
      msg  = lib.tcidberrmsg( code )
      raise Error.new("[ERROR #{code}] : #{msg}")
    end
Raises a dystopian error (asks the db which one)