RIPE Database

[parsakafi]

Hello
Sometimes when whois some TLD receive this response:

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

%ERROR:101: no entries found
%
% No entries found in source RIPE.

% This query was served by the RIPE Database Query Service version 1.98 (HEREFORD)

For example domain: nic.bf
This is not always happened.

How to add "-B" flag to the request?