X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FPCAPanel.java;h=d0b3bbca7501c30aed5537e60a0d0247d5801ff4;hb=8f2acf658e855209c6db6b68d5cc0779733c3d7e;hp=8e0bc3740f4ba671fb78e335e6861d20713d414a;hpb=577f505f54fe343e89f581461e780ea8308c20ec;p=jalview.git

diff --git a/src/jalview/gui/PCAPanel.java b/src/jalview/gui/PCAPanel.java
index 8e0bc37..d0b3bbc 100755
--- a/src/jalview/gui/PCAPanel.java
+++ b/src/jalview/gui/PCAPanel.java
@@ -23,7 +23,7 @@ public class PCAPanel extends GPCAPanel implements Runnable
   public PCAPanel(AlignViewport av, SequenceI[] s) {
 
     this.av = av;
-    if(av.getSelectionGroup().getSize()>3)
+    if(av.getSelectionGroup()!=null && av.getSelectionGroup().getSize()>3)
     {
       s = new Sequence[av.getSelectionGroup().getSize()];
       for(int i=0; i<s.length; i++)