From 153f627dfe0eebaf6249a377af18a2d0c6035958 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Villemot?= <sebastien.villemot@ens.fr>
Date: Wed, 13 Oct 2010 18:52:13 +0200
Subject: [PATCH] Explicit error message for 2nd and 3rd order purely forward
 models

---
 matlab/dr1.m | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/matlab/dr1.m b/matlab/dr1.m
index 19fac2143..3c1722d1e 100644
--- a/matlab/dr1.m
+++ b/matlab/dr1.m
@@ -254,6 +254,10 @@ if M_.maximum_endo_lead == 0
     return
 end
 
+if M_.maximum_endo_lag == 0 && options_.order > 1
+    error(['2nd and 3rd order approximation not implemented for purely forward models'])
+end
+
 %forward--looking models
 if nstatic > 0
     [Q,R] = qr(b(:,1:nstatic));