diff --git a/src/@x13/print.m b/src/@x13/print.m
index a2aff33721003fd0b43b4dd2eca9c12021b59a00..794960c4fbc3e26fb9c390d20f82acce94f537d8 100644
--- a/src/@x13/print.m
+++ b/src/@x13/print.m
@@ -36,6 +36,9 @@ end
 fprintf(fid, 'series {\n');
 fprintf(fid, ' title = "%s"\n', o.y.name{1});
 printstart(fid, o.y.init);
+p1 = firstobservedperiod(o.y);
+p2 = lastobservedperiod(o.y);
+printspan(fid, p1, p2);
 fprintf(fid, ' period = %i\n', o.y.init.freq);
 fprintf(fid, ' data = %s', sprintf(data2txt(o.y.data)));
 fprintf(fid, '}\n\n');
@@ -212,4 +215,6 @@ if ismember('x11', o.commands)
         end
     end
     fprintf(fid, '}\n\n');
-end
\ No newline at end of file
+end
+
+fclose(fid);
\ No newline at end of file
diff --git a/src/@x13/x13.m b/src/@x13/x13.m
index 40fedeac04b37a7c5e86b238ef4cc5e4af90498a..466e76d6870fe27133661cb32f80b04fe5312ad8 100644
--- a/src/@x13/x13.m
+++ b/src/@x13/x13.m
@@ -73,6 +73,8 @@ classdef x13<handle % --*-- Unitary tests --*--
                 else
                     error('x13:: Wrong input argument (a dseries object is expected)!')
                 end
+            else
+                o.x = dseries();
             end
             % Initialize other members (they are empty initially and must be set by calling methods)
             o.arima = setdefaultmember('arima');
diff --git a/src/utilities/x13/printspan.m b/src/utilities/x13/printspan.m
new file mode 100644
index 0000000000000000000000000000000000000000..7bbcd5cd6c5a879f561a06741ee75cd746d8b535
--- /dev/null
+++ b/src/utilities/x13/printspan.m
@@ -0,0 +1,40 @@
+function printspan(fid, period1, period2)
+
+% Copyright (C) 2017 Dynare Team
+%
+% This code 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.
+%
+% Dynare dates submodule 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 Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+if ~isequal(period1.freq, period2.freq)
+    error('x13:printspan: Second and third input argument must have common frequency!')
+end
+
+if ~ismember(period1.freq, [1 4 12]) || ~ismember(period2.freq, [1 4 12]) 
+    error('x13:printspan: Only monthly, quaterly or annual data are allowed!')
+end
+
+if period1>=period2
+    error('x13:printspan: Third argument has to be greater than the second argument!')
+end
+
+switch period1.freq
+  case 12
+    ListOfMonths = {'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'};
+    fprintf(fid, ' span = (%i.%s, %i.%s)\n', period1.year, ListOfMonths{period1.subperiod}, period2.year, ListOfMonths{period2.subperiod});
+  case 4
+    fprintf(fid, ' span = (%i.%s, %i.%s)\n', period1.year, period1.subperiod, period2.year, period2.subperiod);
+  case 1
+    fprintf(fid, ' span = (%i,%i)\n', period1.year, period2.year);
+  otherwise
+    error('x13:regression: This is a bug! Please contact the authors.')
+end
\ No newline at end of file