sequence may be null if hidden or deleted

diff --git a/src/jalview/gui/IdCanvas.java b/src/jalview/gui/IdCanvas.java
index 24bf616..32cbfb5 100755 (executable)
--- a/src/jalview/gui/IdCanvas.java
+++ b/src/jalview/gui/IdCanvas.java
@@ -286,6 +286,9 @@ public class IdCanvas extends JPanel
             {\r
               sequence = av.alignment.getSequenceAt(i);\r
 \r
+              if(sequence==null)\r
+                continue;\r
+\r
               if (av.hasHiddenRows)\r
               {\r
                 setHiddenFont(i);\r