--- a/inst/test_optiminterp_err.m
+++ b/inst/test_optiminterp_err.m
@@ -1,3 +1,18 @@
+%% Copyright (C) 2006 Alexander Barth <barth.alexander@gmail.com>
+%%
+%% This program is free software; you can redistribute it and/or modify it under
+%% the terms of the GNU General Public License as published by the Free Software
+%% Foundation; either version 3 of the License, or (at your option) any later
+%% version.
+%%
+%% This program is distributed in the hope that it will be useful, but WITHOUT
+%% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+%% FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+%% details.
+%%
+%% You should have received a copy of the GNU General Public License along with
+%% this program; if not, see <http://www.gnu.org/licenses/>.
+
 % Tests 2D optimal interpolation and compares result 
 % (analysis and error field) to global OI solution