From 4feca5401b12b8b49cb7813753f54969c8b799bc Mon Sep 17 00:00:00 2001
From: lempinen <lempinen@ac1ea38d-2e2b-0410-8846-a27921b304fc>
Date: Thu, 27 May 2010 14:27:17 +0000
Subject: [PATCH] git-svn-id:
 https://www.simantics.org/svn/simantics/sysdyn/trunk@15964
 ac1ea38d-2e2b-0410-8846-a27921b304fc

---
 .../sysdyn/ui/dependencies/CreateDependencyGraph.java       | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/dependencies/CreateDependencyGraph.java b/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/dependencies/CreateDependencyGraph.java
index 2d6f5e00..ea278090 100644
--- a/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/dependencies/CreateDependencyGraph.java
+++ b/org.simantics.sysdyn.ui/src/org/simantics/sysdyn/ui/dependencies/CreateDependencyGraph.java
@@ -23,13 +23,13 @@ public class CreateDependencyGraph implements Read<Graph> {
 
     public CreateDependencyGraph(Resource root, int levels, boolean isInverted) {
         this.root = root;
-        this.nodes = new HashMap<Resource, Node>();
         this.isInverted = isInverted;    
         this.levels = levels;
     }
 
     @Override
     public Graph perform(ReadGraph g) throws DatabaseException {
+        nodes = new HashMap<Resource, Node>();
         Graph graph = new Graph();
         graph.setRankdir("LR");
         if (g.isInstanceOf(root, SysdynResource.getInstance(g).IndependentVariable)) {
@@ -67,7 +67,9 @@ public class CreateDependencyGraph implements Read<Graph> {
         Collection<Resource> dependencies = g.getObjects(r, headRelation);
         Collection<Resource> dependants = new ArrayList<Resource>();
         for(Resource d : dependencies) {
-            Resource dependant = g.getSingleObject(d, tailRelation);
+            Resource dependant = g.getPossibleObject(d, tailRelation);
+            if(dependant == null)
+                continue;
             if(!g.isInstanceOf(dependant, sr.IndependentVariable)) {
                 break;
             }
-- 
2.47.1