From 32ed4bfe1c1caa6843695eafda0b284d359312b0 Mon Sep 17 00:00:00 2001
From: villberg <villberg@ac1ea38d-2e2b-0410-8846-a27921b304fc>
Date: Tue, 22 Jul 2014 12:12:46 +0000
Subject: [PATCH] refs #5122

git-svn-id: https://www.simantics.org/svn/simantics/sysdyn/trunk@29936 ac1ea38d-2e2b-0410-8846-a27921b304fc
---
 .../ui/editor/participant/SysdynConnectionBuilder.java       | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/editor/participant/SysdynConnectionBuilder.java b/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/editor/participant/SysdynConnectionBuilder.java
index 5f3c3259..e4467d9f 100644
--- a/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/editor/participant/SysdynConnectionBuilder.java
+++ b/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/editor/participant/SysdynConnectionBuilder.java
@@ -66,7 +66,10 @@ public class SysdynConnectionBuilder extends ConnectionBuilder{
      */
     public void create(WriteGraph graph, ConnectionJudgement judgment, Deque<ControlPoint> controlPoints,
             TerminalInfo startTerminal, TerminalInfo endTerminal) throws DatabaseException {
-        
+
+    	if(startTerminal == null) return;
+    	if(endTerminal == null) return;
+    	 
         graph.markUndoPoint();
         
     	// If needs a valve, we will create two separate connections
-- 
2.47.1