From e5fb0efd7b78e541d8c2b114b28ddd4d39ad2510 Mon Sep 17 00:00:00 2001
From: Houtan Bastani <houtan@dynare.org>
Date: Wed, 14 Feb 2018 11:47:55 +0100
Subject: [PATCH] add assert for fan option

---
 matlab/reporting/src/@graph/writeGraphFile.m | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/matlab/reporting/src/@graph/writeGraphFile.m b/matlab/reporting/src/@graph/writeGraphFile.m
index 3f4cd48d8..bb744126d 100644
--- a/matlab/reporting/src/@graph/writeGraphFile.m
+++ b/matlab/reporting/src/@graph/writeGraphFile.m
@@ -277,6 +277,8 @@ if isunix && ~ismac
         for i=2:ne
             tmp = ds{i} - ds{i-1};
             idx = find(tmp.data ~= 0);
+            assert(~isempty(idx), ...
+                   'Problem creating fan area for data provided. Please check your data.');
             split = ds(ds.dates(idx));
         end
         idx = find(ds.dates == split.dates(1));