X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FTreeCanvas.java;h=e60ac8eb479c4e9ded5d32228f641ca819eee9c6;hb=61e0e9704ff9fafba47480445fd5a38b82024b0d;hp=3494fb8c847f0a25eab90827c372198ac4b4b4e6;hpb=f467f7a8ae326c999059895ad4de736b54e331e3;p=jalview.git

diff --git a/src/jalview/gui/TreeCanvas.java b/src/jalview/gui/TreeCanvas.java
index 3494fb8..e60ac8e 100755
--- a/src/jalview/gui/TreeCanvas.java
+++ b/src/jalview/gui/TreeCanvas.java
@@ -332,9 +332,10 @@ public class TreeCanvas extends JPanel implements MouseListener, Runnable,
         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 = (node.left() == null ? 0 : (int) (((SequenceNode) node
+              .left()).ycount * chunk)) + offy;
+      int yend = (node.right() == null ? 0 : (int) (((SequenceNode) node
+              .right()).ycount * chunk))
               + offy;
 
       Rectangle pos = new Rectangle(xend - 2, ypos - 2, 5, 5);