JAL-1989 map hidden column ranges

[jalview.git] / src / jalview / util / Comparison.java

diff --git a/src/jalview/util/Comparison.java b/src/jalview/util/Comparison.java
index dfc243d..8902e2c 100644 (file)
--- a/src/jalview/util/Comparison.java
+++ b/src/jalview/util/Comparison.java
@@ -265,10 +265,13 @@ public class Comparison
     char[][] letters = new char[seqs.length][];
     for (int i = 0; i < seqs.length; i++)
     {
-      char[] sequence = seqs[i].getSequence();
-      if (sequence != null)
+      if (seqs[i] != null)
       {
-        letters[i] = sequence;
+        char[] sequence = seqs[i].getSequence();
+        if (sequence != null)
+        {
+          letters[i] = sequence;
+        }
       }
     }