X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fjalview%2Fappletgui%2FTreeCanvas.java;h=272a2b3f172cfc536289690cd4de34fcdba2fd74;hb=613818a08b858e3fe0dd778c738a362b3a4a0882;hp=48e9d643ab12f25d6c7e3e4cd3e05d04788b8720;hpb=be27d7b3cadbfb5c488066034c48b1735799b429;p=jalview.git

diff --git a/src/jalview/appletgui/TreeCanvas.java b/src/jalview/appletgui/TreeCanvas.java
index 48e9d64..272a2b3 100755
--- a/src/jalview/appletgui/TreeCanvas.java
+++ b/src/jalview/appletgui/TreeCanvas.java
@@ -261,10 +261,11 @@ public class TreeCanvas extends Panel implements MouseListener,
         g.fillRect(xend - 2, ypos - 2, 4, 4);
       }
 
-      int ystart = (int) (((SequenceNode) node.left()).ycount * chunk)
-              + offy;
-      int yend = (int) (((SequenceNode) node.right()).ycount * chunk)
+      int ystart = (int) (node.left() == null ? 0 : (((SequenceNode) node
+              .left()).ycount * chunk))
               + offy;
+      int yend = (int) (node.right() == null ? 0 : (((SequenceNode) node
+              .right()).ycount * chunk)) + offy;
 
       Rectangle pos = new Rectangle(xend - 2, ypos - 2, 5, 5);
       nodeHash.put(node, pos);