diff --git a/src/read/load_data.m b/src/read/load_data.m
index 2c3c81de69e6aed1ee0cf511371e61f892d8c2f0..9e7d8cb5bd97e3ff1ada8c60ef3cbce222ec1048 100644
--- a/src/read/load_data.m
+++ b/src/read/load_data.m
@@ -25,13 +25,13 @@ function [init, data, varlist, tex, ops, tags] = load_data(filename)
 % along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
 
 if ~nargin || ~ischar(filename) || isempty(filename)
-    error('dseries:load_data: WrongInputArguments', 'Input argument cannot be an empty string!')
+    error('dseries:load_data: Input argument cannot be an empty string!')
 elseif check_file_extension(filename,'m')
-    [freq, init, data, varlist, tex, ops, tags] = load_m_file_data(filename);
+    [~, init, data, varlist, tex, ops, tags] = load_m_file_data(filename);
 elseif check_file_extension(filename,'mat')
-    [freq, init, data, varlist, tex, ops, tags] = load_mat_file_data(filename);
+    [~, init, data, varlist, tex, ops, tags] = load_mat_file_data(filename);
 elseif check_file_extension(filename,'csv')
-    [freq, init, data, varlist] = load_csv_file_data(filename);
+    [~, init, data, varlist] = load_csv_file_data(filename);
     tex = [];
     ops = cell(length(varlist), 1);
     tags = struct();
@@ -46,7 +46,7 @@ elseif check_file_extension(filename,'xls') || check_file_extension(filename,'xl
         range = [];
         sheet = [];
     end
-    [freq, init, data, varlist] = load_xls_file_data(filename, sheet, range);
+    [~, init, data, varlist] = load_xls_file_data(filename, sheet, range);
     tex = [];
     ops = cell(length(varlist), 1);
     tags = struct();