X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fdatamodel%2FHiddenSequences.java;fp=src%2Fjalview%2Fdatamodel%2FHiddenSequences.java;h=98e9694fe21d24161035cd1fc323c3f5b2239c38;hb=1dcf7a8a1ab8fd8fb5259c0aaca2a6c73ed056ad;hp=a57dc9c5278064084beab0343e153615491dd4cb;hpb=5c41e4193f3bebb1c8e11c124a4928d1419b052c;p=jalview.git

diff --git a/src/jalview/datamodel/HiddenSequences.java b/src/jalview/datamodel/HiddenSequences.java
index a57dc9c..98e9694 100755
--- a/src/jalview/datamodel/HiddenSequences.java
+++ b/src/jalview/datamodel/HiddenSequences.java
@@ -157,9 +157,10 @@ public class HiddenSequences
     int absAlignmentIndex = alignment.findIndex(sequence);
     int alignmentIndex = adjustForHiddenSeqs(absAlignmentIndex);
 
-    if (hiddenSequences[alignmentIndex] != null)
+    if (alignmentIndex < 0 || hiddenSequences[alignmentIndex] != null)
     {
       System.out.println("ERROR!!!!!!!!!!!");
+      return;
     }
 
     hiddenSequences[alignmentIndex] = sequence;