From 562e94c776a874b2cb8e29e76d24c1478f0a69c8 Mon Sep 17 00:00:00 2001
From: James Procter <j.procter@dundee.ac.uk>
Date: Thu, 28 Sep 2023 17:59:17 +0100
Subject: [PATCH] =?utf8?q?JAL-3858=20don=E2=80=99t=20divide=20if=20we=20only?=
 =?utf8?q?=20had=20one=20value=20to=20count?=
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---
 src/jalview/datamodel/ContactListImpl.java |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/jalview/datamodel/ContactListImpl.java b/src/jalview/datamodel/ContactListImpl.java
index bb31c5d..7058ac7 100644
--- a/src/jalview/datamodel/ContactListImpl.java
+++ b/src/jalview/datamodel/ContactListImpl.java
@@ -88,7 +88,7 @@ public class ContactListImpl implements ContactListI
         }
       }
     }
-    if (tot > 0)
+    if (tot > 0 && to_column>from_column)
     {
       cr.setMean(tot / (1 + to_column - from_column));
     }
-- 
1.7.10.2