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JAL-1031 JAL-1032 if selection is non-null but empty, then calculate PCA or tree...
[jalview.git] / src / jalview / gui / AlignFrame.java
diff --git a/src/jalview/gui/AlignFrame.java b/src/jalview/gui/AlignFrame.java
index 8396e6a..39884ce 100755 (executable)
--- a/src/jalview/gui/AlignFrame.java
+++ b/src/jalview/gui/AlignFrame.java
@@ -3668,7 +3668,7 @@ public class AlignFrame extends GAlignFrame implements DropTargetListener,
   {
     TreePanel tp;
 
-    if (viewport.getSelectionGroup() != null)
+    if (viewport.getSelectionGroup() != null && viewport.getSelectionGroup().getSize()>0)
     {
       if (viewport.getSelectionGroup().getSize() < 3)
       {